Category: Musings

Getting older and older!

An interesting post for all of us, albeit, those on the right side of 70? will find this less important.

It is very difficult for me to add anything useful to this article so I will not try.

Except to say that the author, Aditi Gurkar, is Assistant Professor of Geriatric Medicine at the University of Pittsburgh so she should know what she is talking about!

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Are you a rapid ager? Biological age is a better health indicator than the number of years you’ve lived, but it’s tricky to measure

Healthspan measures incorporate quality of life in ways that lifespan does not. Ira T. Nicolai/The Image Bank via Getty Images

Aditi Gurkar, University of Pittsburgh

Do you ever wake up some days and think, “When I was younger, I could survive on just four hours of sleep, but now it seems like I need 10”? Or have you ever walked out of the gym and “felt” your knees?

Almost everyone experiences these kinds of signs of aging. But there are some people who seem to defy their age. The late U.S. Supreme Court Justice Ruth Bader Ginsberg stayed on the bench until her death at age 87. The “Great British Bake Off” judge Mary Berry, now in her 80s, continues to inspire people all over the world to bake and enjoy life. And actor Paul Rudd was named People magazine’s “Sexiest Man Alive” in 2021 at age 52 while still looking like he’s in his 30s. Is age just a number then?

Researchers have focused a lot of attention on understanding the causes and risk factors of age-related diseases like Alzheimer’s, dementia, osteoporosis and cancer. But many ignore the major risk factor for all of these diseases: aging itself. More than any individual risk factor such as smoking or lack of exercise, the number of years you’ve lived predicts onset of disease. Indeed, aging increases the risk of multiple chronic diseases by up to a thousandfold.

However, no two people age the same. Although age is the principal risk factor for several chronic diseases, it is an unreliable indicator of how quickly your body will decline or how susceptible you are to age-related disease. This is because there is a difference between your chronological age, or the number of years you’ve been alive, and your biological age – your physical and functional ability.

As the author notes in her TED Talk, aging is not just a number.

I am a scientist interested in redefining “age.” Instead of benchmarking chronological age, my lab is invested in measuring biological age. Biological age is a more accurate measure of healthspan, or years lived in good health, than chronological age, and doesn’t directly correlate with wrinkles and gray hairs. Rapid agers experience a faster rate of functional deterioration relative to their chronological age.

My grandmother, who lived to be 83 but was bedridden and could not remember who I was for the last few years of her life, was a rapid ager. My grandfather, on the other hand, also lived until he was 83, but he was active, functional and even did my homework with me until he passed away – he was a healthy ager.

With the unprecedented growth of the world’s aging population, I believe that figuring out ways to measure biological age and how to maintain or delay its advance is critical not only for individual health, but also for the social, political and economic health of our society. Detecting rapid agers early on presents an opportunity to delay, change or even reverse the trajectory of biological aging.

Genetics and biological age

Biological aging is multifaceted. It arises from a complex mix of genetic traits and is influenced by factors like microbiome composition, environment, lifestyle, stress, diet and exercise.

Genetics were once thought to have no influence on aging or longevity. However, in the early 1990s, researchers reported the first studies identifying genes that were able to extend the lifespan of a small roundworm. Since then, multiple observations support the influence of genetics on aging.

For example, children of long-lived parents and even those with long-lived siblings tend to live longer. Researchers have also identified multiple genes that influence longevity and play a role in resilience and protection from stress. These include genes that repair DNA, protect cells from free radicals and regulate fat levels.

However, it is clear from studies in identical twins – who share the same genes but not the same exact lifespans – that genes are not the only factor that influences aging. In fact, genes probably account for only 20% to 30% of biological age. This suggests that other parameters can strongly influence biological aging.

Environmental and lifestyle effects

Researchers have found that environmental and lifestyle factors heavily influence biological age, including social connectedness, sleeping habits, water consumption, exercise and diet.

Social connectedness is essential for well-being throughout life. But social connections can be challenging to maintain over time due to loss of family and friends, depression, chronic illness or other factors. Several studies have reported a strong link between social isolation and increased stress, morbidity and mortality.

Three women dancing together in a park
Social connectedness and physical activity are linked to well-being throughout life. Filippo Bacci/E+ via Getty Images

Similarly, diet and exercise are strong influencers of biological age. Blue zones, which are areas around the world where people live long lives, attribute their successful aging to diet, exercise and social connectedness. Mostly plant-based meals and spurts of activity throughout the day are well-known “secrets” of healthspan and longevity. Although newer studies on the effects of diet interventions such as intermittent fasting and time-restricted feeding on longevity have not been rigorously tested, they do show multiple health benefits, including better glucose and insulin regulation

While genetics is difficult to control, diet and exercise can be modified to delay biological aging.

How to measure biological age

Currently, there is no effective test to predict an individual’s health trajectory early enough in life in order to intervene and improve quality of life with age. Scientists are interested in identifying a molecule that is sensitive and specific enough to serve as a unique fingerprint for biological age.

Considering the health and resilience of the individual instead of focusing solely on disease state is important in discussions on biological age. Resilience is the state of adapting and bouncing back from a health challenge and is often more predictive of functional health. A molecular aging fingerprint may provide a tool to help identify people who are less resilient and require more aggressive monitoring and early intervention to preserve their health and help reduce gender, racial and ethnic health disparities.

There are several promising molecular markers that may serve as biological age fingerprints.

One of these markers are epigenetic clocks. Epigenetics are chemical modifications of DNA that control gene function. Several scientists have found that DNA can get “marked” by methyl groups in a pattern that changes with age and could potentially act as a readout for aging.

It is important to note, however, that while epigenetic clocks have been valuable in predicting chronological age, they do not equate to biological age. In addition, it is unclear how these epigenetic marks work or how they contribute to aging.

Older adult holding gold balloons of the number 70 in a backyard
Age is so much more than a number. Klaus Vedfelt/DigitalVision via Getty Images

Another well-regarded marker of biological age is the build-up of dysfunctional cells called senescent or zombie cells. Cells become senescent when they experience multiple types of stress and become so damaged that they cannot divide anymore, releasing molecules that cause chronic low-grade inflammation and disease.

Animal studies have shown that getting rid of these cells can improve healthspan. However, what clearly defines senescent cells in humans is still unknown, making them challenging to track as a measure of biological age.

Lastly, the body releases unique metabolites, or chemical fingerprints, as byproducts of normal metabolism. These metabolites play a dynamic and direct role in physiological regulation and can inform functional health. My lab and others are figuring out the exact makeup of these chemicals in order to figure out which can best measure biological age. A lot of work still remains on not only identifying these metabolites, but also understanding how they affect biological age.

People have long sought a fountain of youth. Whether such an elixir exists is still unknown. But research is starting to show that delaying biological age may be one way to live healthier, fuller lives.

Aditi Gurkar

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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There is no arguing the fact that more and more great articles are appearing online. Indeed, the whole world is changing radically in many areas.

Onwards and upwards! 😉

Footnote: This appeared online on the Inspiring Quotes website. The link is here, from which I reproduce the following:

Growing older is one of the most pervasive preoccupations of humankind. The passing of time is, after all, an inescapable part of the human condition. And aging, like love, is one of the most common themes in literature, be it the calm of poet Robert Brownings’ “Grow old along with me! The best is yet to be,” or poet Dylan Thomas’ raging against the dying of the light. 

This is just a beautiful Picture Parade

In other words, Picture Parade Four Hundred and Seventy-Eight.

Introducing A guest post (sort of) by Cara Sue Achterberg.

Read this! It tells the story of the volunteers who spend their time at the Animal Control centre in Bernie County.

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Animal Control And/Or Care

By Cara Sue Achterberg

Bertie County is a small county most people pass through on their way to vacation on the Outer Banks. The county’s tiny shelter is the next to last stop on a road that ends at the regional jail. The shelter sits on a property prone to flooding, and although the county has had plans to move it, the folks we talked to were skeptical that the collection of sheds, trailers, and kennels would leave the spot it has occupied as long as anyone can remember.

Bertie County Animal Control in Windsor is a municipal, open-intake shelter comprised of ten kennels on a concrete pad with a roof, plus two quarantine kennels, and three puppy runs.

There is no heat or AC or walls, for that matter. The day we arrived, county maintenance workers were busy wrapping plastic around the kennels to try to give the dogs some protection from the cold.

The county has two full-time Animal Control officers and one part-time ACO, but the care of the dogs is done by Josh, a full-time kennel tech. The county pays for Josh (and a part-time person who comes in once on Saturday and Sunday to feed/clean), plus the ACO salaries, and the property utilities, but everything else is left up to the Bertie County Humane Society.

Beyond the $2000/year the county gives the Humane Society, they must raise the money to pay for everything else – veterinary needs, vaccinations, spay/neuter, food/treats, transport to rescues, beds, heartworm preventative, flea/tick treatment, dewormers and anything else.

Pretty much every dog that comes in is heartworm positive. As Vicky, a volunteer who used to be the kennel manager at the shelter, told me, “If we get one that’s negative, I go buy a lottery ticket!”

Vicky was at the shelter that day to give rabies vaccines to Cooper and Spot, two young dogs at the shelter. (NC is the first state I’ve discovered that doesn’t require that rabies vaccines be given by a veterinarian.)

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We learned about Bertie County after we connected with another of their volunteers, Gina. Gina lives two hours away, but she is a tireless advocate for the dogs and the shelter. She networks the dogs to rescues, arranges for veterinarian appointments and transports, even finds donors to pay for heartworm treatment. Gina is one of those rescue warriors with a heart that just slays me. It’s inhuman how many hours and how much work she puts in to save these dogs, many she has never met.

Gina has been involved with BCHS ever since she discovered how many dogs were being killed in Bertie County. She began pulling dogs to foster within her rescue operation and eventually called on other rescues to get involved. Because she lives so far away, she depends on Diane, who lives in Bertie County and is the president of the Humane Society, and Vicky, who used to be the kennel manager at the shelter and still volunteers her time there.

There were only six dogs (and lots of cats) the day we visited thanks to Gina’s work to find rescues to empty the shelter just before the holidays and the bitter, record cold that came. The shelter normally handles about 100 dogs a year.

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Because of the number of photographs, beautiful photographs I would add, this is today’s Picture Parade.

Dogs and cats

A guest post from Ashly Brown

This is a great post. As I just said a guest post that covers an important question; for those that have cats and dogs read on!

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How to Stop a Dog Aggression Towards Cats

By Ashly Brown.

Meta Description

Learn how to stop dog aggression towards cats with these helpful tips and techniques. Discover how to train and manage your dog to live peacefully with cats and prevent any dangerous incidents.

How to Stop a Dog Aggression Towards Cats

Dogs and cats are known to be natural enemies, and it’s not unusual for dogs to act aggressively towards cats. Even though it’s natural for a dog to feel territorial or defensive around a cat, this can be dangerous for the cat and stressful for the owner. So, it’s important to do something to stop a dog from being mean to cats. Here are some tips:

  • Watch out for your dog around cats.

The first thing you can do to stop your dog from being mean to cats is to always watch your dog when it’s around cats. Even if you think your dog is friendly towards cats, you should never leave your dog alone with a cat. Dogs can be hard to predict, and their instincts to hunt can come out at any time.

  • Slowly get your dog used to the cat.

It’s important to go slowly and carefully when bringing a new cat into your home or letting your dog meet a cat for the first time. Keep your dog on a leash and let your cat come up to it at its own speed. Give your dog treats for being good, and keep a close eye on them at all times.

  • Teach your dog the basic commands for obedience.

If you teach your dog basic obedience commands like “sit,” “stay,” and “leave it,” it will be less likely to attack cats. By teaching your dog to do what you say, you can take its mind off the cat and keep it from chasing or hurting it.

  • Give your dog and cat separate places to live.

If your dog and cat don’t get along, you may need to give them each their own place to live. This could mean putting your cat in a different room or putting a baby gate between your cat and dog. Make sure your cat’s separate living space has a place to eat, drink, and go to the bathroom.

  • Use training with positive reinforcement

Positive reinforcement is a great way to teach your dog how to behave well. When your dog acts well around your cat, praise them or give them treats. This will make them more likely to keep behaving well and make them feel good about the cat behavior.

  • Think about asking an expert.

If your dog is very mean to cats, you may need to get help from a professional dog trainer or behaviorist. They can help you come up with a plan for training your dog that fits its needs and habits. They might also be able to give you more advice on how to stop your dog from being mean to cats.

  • Think About Medications

In some cases, a dog may need to be put on medicine to stop being mean to cats. Talk to your vet about whether your dog can take a certain medicine. They might be able to give you medicine to help your dog feel less anxious or less likely to attack cats.

  • Be steady and patient.

Stopping a dog from being mean to a cat can take a long time and patience and consistency. Don’t stop working with your dog if you don’t see results right away. You can teach your dog to get along with cats if you give it time and work at it.

  • Figure out the cause

Find out what makes your dog act mean towards cats. This can help you stop the behavior. It could be a certain sound or smell, or it could be something the cat does. You can work to get rid of the trigger or get your dog used to it if you know what it is.

  • Desensitize Your Dog

Desensitizing your dog means slowly exposing them to the thing that makes them aggressive towards cats, while keeping them far away. This can help them feel less scared or worried about the trigger and keep them from getting angry. Start by showing the trigger to your dog from a distance where they don’t show any signs of aggression. Over time, you can slowly get closer.

  • Use a muzzle or head collar.

Putting your dog in a head collar or giving it a muzzle can help keep it from attacking the cat. Dog bark collars can help you keep your dog from moving around too much, and muzzles can stop them from biting or attacking. It’s important to know how to use these tools right and to never leave your dog alone while they are on.

  • Manage Your Dog’s Environment

Taking care of your dog’s environment can help stop your dog from being mean to cats. This could mean keeping your dog on a leash when there are cats around or putting up baby gates to keep them apart. It’s important to give your dog and cat a safe and secure place to live.

Conclusion 

In conclusion, it is possible to stop a dog from being mean to a cat, but it takes time, patience, and consistent work on the part of the owner. Understanding why your dog is mean to cats is very important for coming up with a good plan to stop the behavior. You should never punish or hurt your dog physically if he or she is mean to cats. This can make the problem worse and cause fear and anxiety.

Focus instead on training with positive reinforcement, desensitization, and management techniques like making a safe space and using head collars or muzzles. Your dog can learn to live peacefully with cats with consistent training and management. This can prevent any dangerous or harmful situations from happening.

It’s important to remember that every dog is different, and what works for one dog might not work for another. Talking to a professional dog trainer or behaviorist can help you come up with a custom plan to stop your dog from being mean to cats.

Author Bio:

Ashly Brown is an experienced writer and pet enthusiast who loves to share her knowledge and insights on the latest trends in pet care. As a dedicated pet cat owner, Ashley understands the importance of finding the best gadgets to keep your feline friend healthy, happy, and entertained in the pet cats world. With her expertise in technology and pet care, Ashley provides valuable information and advice to help cat owners make informed decisions about the latest gadgets for their furry friends

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Ashly shows her experience as a pet lover and being a writer; in spades!

There will be many that have cats and dogs who take her advice with great interest and many of you that will find in Ashly’s tips some very educational ideas.

Thank you, Ashly!

The relationship between us and wild animals.

In this particular case looking at the wolf.

So many times a particular article from a website that allows republishing is not only a good and relevant article but also is a quick way of me publishing a post when, as I was yesterday, a bit pressed for time.

So here is that article from The Conversation.

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Wolf restoration in Colorado shows how humans are rethinking their relationships with wild animals

A gray wolf in Yellowstone National Park. NPS/Jim Peaco

Christopher J. Preston, University of Montana

From sports to pop culture, there are few themes more appealing than a good comeback. They happen in nature, too. Even with the Earth losing species at a historic rate, some animals have defied the trend toward extinction and started refilling their old ecological niches.

I’m a philosopher based in Montana and specialize in environmental ethics. For my new book, “Tenacious Beasts: Wildlife Recoveries That Change How We Think About Animals,” I spent three years looking at wildlife comebacks across North America and Europe and considering the lessons they offer. In every case, whether the returnee is a bison, humpback whale, beaver, salmon, sea otter or wolf, the recovery has created an opportunity for humans to profoundly rethink how we live with these animals.

One place to see the rethink in action is Colorado, where voters approved a ballot measure in 2020 mandating the reintroduction of gray wolves west of the Continental Divide. Colorado’s Parks and Wildlife Agency has released a draft plan that calls for moving 30 to 50 gray wolves from other Rocky Mountain states into northwest Colorado over five years, starting in 2024.

Aldo Leopold, the famed conservationist and professor of game management at the University of Wisconsin, believed that moral beliefs evolve over time to become more inclusive of the natural world. And what’s happening in Colorado suggests Leopold was right. Human attitudes toward wolves have clearly evolved since the mid-1940s, when bounties, mass poisoning and trapping eradicated wolves from the state.

Recovering animals encounter a world that is markedly different from the one in which they declined, especially in terms of how people think about wildlife. Here are several reasons I see why societal attitudes toward wolves have changed. The importance of keystone species

Wolves released in northwest Colorado will wear GPS collars that enable wildlife managers to track them.

The idea that certain influential species, which ecologists call keystone species, can significantly alter the ecosystems around them first appeared in scientific literature in 1974. Bison, sea otters, beavers, elephants and wolves all exert this power. One way in which wolves wield influence is by preying on coyotes, which produces ripple effects across the system. Fewer coyotes means more rodents, which in turn means better hunting success for birds of prey.

Wolves also cause nervous behaviors among their prey. Some scientists believe that newly returned predators create a “landscape of fear” among prey species – a term that isn’t positive or negative, just descriptive. This idea has shifted thinking about predators. For example, elk avoid some areas when wolves are around, resulting in ecological changes that cascade down from the top. Vegetation can recover, which in turn may benefit other species.

Insights into pack dynamics

Animal behavioral science research has provided pointers for better wolf management. Studies show that wolf packs are less likely to prey on livestock if their social structure remains intact. This means that ranchers and wildlife managers should take care not to remove the pack’s breeding pair when problems occur. Doing so can fragment the pack and send dispersing wolves into new territories.

Wildlife agencies also have access to years of data from close observation of wolf behavior in places like Yellowstone National Park, where wolves were reintroduced starting in 1995. This research offers insights into the wolf’s intelligence and social complexity. All of this information helps to show how people can live successfully alongside them.

Predators provide economic value

Research has also demonstrated that wolves provide economic benefits to states and communities. Wisconsin researchers discovered that changes in deer behavior due to the presence of wolves have saved millions of dollars in avoided deer collisions with cars. These savings far exceed what it costs the state to manage wolves.

Wolf recovery has been shown to be a net economic benefit in areas of the U.S. West where they have returned. The dollars they attract from wolf-watchers, photographers and foreign visitors have provided a valuable new income stream in many communities.

Predators do kill livestock, but improved tracking has helped to put these losses in perspective. Montana Board of Livestock numbers show that wolves, grizzly bears and mountain lions caused the loss of 131 cattle and 137 sheep in the state in 2022. This is from a total of 2,200,000 cattle and 190,000 sheep. Of the 131 cattle, 36 were confirmed to be taken by wolves – 0.0016% of the statewide herd.

According to the U.S. Department of Agriculture, dogs, foxes and coyotes in Montana all killed more sheep and lambs than wolves did in 2020. Even eagles were three times more deadly to sheep and lambs than wolves were.

Actual costs to ranchers are certainly higher than these numbers suggest. The presence of wolves causes livestock to lose weight because the animals feed more nervously when wolves are around. Ranchers also lose sleep as they worry about wolves attacking their livestock and guard dogs. And clearly, low statewide kills are small comfort to a rancher who loses a dozen or more animals in one year. Margins are always tight in the livestock business.

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A northern Colorado rancher discusses options for protecting his cattle from wolves, which already are naturally present in the state.

What’s more, predators’ economic impacts don’t end with ranching. In Colorado, for example, elk numbers are likely to decline after wolves are reintroduced. This may affect state wildlife agency budgets that rely on license fees from elk hunters. It may also affect hunting outfitters’ incomes.

In my view, voters who supported bringing wolves back to Colorado should remain deeply aware of the full distribution of costs and support proactive compensation schemes for losses. They should be mindful that support for wolf reintroduction varies drastically between urban and rural communities and should insist that effective mechanisms are in place ahead of time to ensure fair sharing of the economic burdens that wolves generate.

A new ethical playing field

Despite these complexities, the idea of the “big bad wolf” clearly no longer dominates Americans’ thinking. And the wolf is not alone. Social acceptance of many other wildlife species is also increasing. For example, a 2023 study found that between 80% and 90% of Montanans believed grizzly bears – which are recovering and expanding their presence there – have a right to exist.

Aldo Leopold famously claimed to have experienced an epiphany when he shot a wolf in New Mexico in the 1920s and saw “a fierce green fire” dying in her eyes. In reality, his attitude took several more decades to change. Humans may have an ingrained evolutionary disposition to fear carnivorous predators like wolves, but the change ended up being real for Leopold, and it lasted.

Leopold, who died in 1948, did not live to see many wildlife species recover, but I believe he would have regarded what’s happening now as an opportunity for Americans’ moral growth. Because Leopold knew that ethics, like animals, are always evolving.

Christopher J. Preston, Professor of Philosophy, University of Montana

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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Those last few paragraphs under the sub-heading of ‘A new ethical playing field’ show how many other wildlife species have gained a real advantage, a social acceptance as the article said. Long may it continue.

The clue to making us human

A really fascinating article from The Conversation on Imagination.

The website The Conversation had another very interesting link to something that sorts out the humans from all other life forms. It is imagination!

I have pleasure in republishing it!

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Imagination makes us human – this unique ability to envision what doesn’t exist has a long evolutionary history

Your brain can imagine things that haven’t happened or that don’t even exist. agsandrew/iStock via Getty Images Plus

Andrey Vyshedskiy, Boston University

Published February, 23rd, 2023

You can easily picture yourself riding a bicycle across the sky even though that’s not something that can actually happen. You can envision yourself doing something you’ve never done before – like water skiing – and maybe even imagine a better way to do it than anyone else.

Imagination involves creating a mental image of something that is not present for your senses to detect, or even something that isn’t out there in reality somewhere. Imagination is one of the key abilities that make us human. But where did it come from?

I’m a neuroscientist who studies how children acquire imagination. I’m especially interested in the neurological mechanisms of imagination. Once we identify what brain structures and connections are necessary to mentally construct new objects and scenes, scientists like me can look back over the course of evolution to see when these brain areas emerged – and potentially gave birth to the first kinds of imagination.

From bacteria to mammals

After life emerged on Earth around 3.4 billion years ago, organisms gradually became more complex. Around 700 million years ago, neurons organized into simple neural nets that then evolved into the brain and spinal cord around 525 million years ago.

Velociraptor chasing a furry critter
It was to mammals’ advantage to hide out while cold-blooded dinosaurs hunted during the day. Daniel Eskridge/Stocktrek Images via Getty Images

Eventually dinosaurs evolved around 240 million years ago, with mammals emerging a few million years later. While they shared the landscape, dinosaurs were very good at catching and eating small, furry mammals. Dinosaurs were cold-blooded, though, and, like modern cold-blooded reptiles, could only move and hunt effectively during the daytime when it was warm. To avoid predation by dinosaurs, mammals stumbled upon a solution: hide underground during the daytime.

Not much food, though, grows underground. To eat, mammals had to travel above the ground – but the safest time to forage was at night, when dinosaurs were less of a threat. Evolving to be warm-blooded meant mammals could move at night. That solution came with a trade-off, though: Mammals had to eat a lot more food than dinosaurs per unit of weight in order to maintain their high metabolism and to support their constant inner body temperature around 99 degrees Fahrenheit (37 degrees Celsius).

Our mammalian ancestors had to find 10 times more food during their short waking time, and they had to find it in the dark of night. How did they accomplish this task?

To optimize their foraging, mammals developed a new system to efficiently memorize places where they’d found food: linking the part of the brain that records sensory aspects of the landscape – how a place looks or smells – to the part of the brain that controls navigation. They encoded features of the landscape in the neocortex, the outermost layer of the brain. They encoded navigation in the entorhinal cortex. And the whole system was interconnected by the brain structure called the hippocampus. Humans still use this memory system for remembering objects and past events, such as your car and where you parked it.

two bits of human brain are highlighted, one on each side
An interior brain structure called the hippocampus helps synthesize different kinds of information to create memories. Sebastian Kaulitzki/Science Photo Library via Getty Images

Groups of neurons in the neocortex encode these memories of objects and past events. Remembering a thing or an episode reactivates the same neurons that initially encoded it. All mammals likely can recall and re-experience previously encoded objects and events by reactivating these groups of neurons. This neocortex-hippocampus-based memory system that evolved 200 million years ago became the first key step toward imagination.

The next building block is the capability to construct a “memory” that hasn’t really happened.

Involuntary made-up ‘memories’

The simplest form of imagining new objects and scenes happens in dreams. These vivid, bizarre involuntary fantasies are associated in people with the rapid eye movement (REM) stage of sleep.

Scientists hypothesize that species whose rest includes periods of REM sleep also experience dreams. Marsupial and placental mammals do have REM sleep, but the egg-laying mammal the echidna does not, suggesting that this stage of the sleep cycle evolved after these evolutionary lines diverged 140 million years ago. In fact, recording from specialized neurons in the brain called place cells demonstrated that animals can “dream” of going places they’ve never visited before.

In humans, solutions found during dreaming can help solve problems. There are numerous examples of scientific and engineering solutions spontaneously visualized during sleep.

The neuroscientist Otto Loewi dreamed of an experiment that proved nerve impulses are transmitted chemically. He immediately went to his lab to perform the experiment – later receiving the Nobel Prize for this discovery.

Elias Howe, the inventor of the first sewing machine, claimed that the main innovation, placing the thread hole near the tip of the needle, came to him in a dream.

Dmitri Mendeleev described seeing in a dream “a table where all the elements fell into place as required. Awakening, I immediately wrote it down on a piece of paper.” And that was the periodic table.

These discoveries were enabled by the same mechanism of involuntary imagination first acquired by mammals 140 million years ago.

young professionals looking at glass wall with post-it notes
Intentionally brainstorming ideas depends on being able to control your imagination. Goodboy Picture Company/E+ via Getty Images

Imagining on purpose

The difference between voluntary imagination and involuntary imagination is analogous to the difference between voluntary muscle control and muscle spasm. Voluntary muscle control allows people to deliberately combine muscle movements. Spasm occurs spontaneously and cannot be controlled.

Similarly, voluntary imagination allows people to deliberately combine thoughts. When asked to mentally combine two identical right triangles along their long edges, or hypotenuses, you envision a square. When asked to mentally cut a round pizza by two perpendicular lines, you visualize four identical slices.

This deliberate, responsive and reliable capacity to combine and recombine mental objects is called prefrontal synthesis. It relies on the ability of the prefrontal cortex located at the very front of the brain to control the rest of the neocortex.

When did our species acquire the ability of prefrontal synthesis? Every artifact dated before 70,000 years ago could have been made by a creator who lacked this ability. On the other hand, starting about that time there are various archeological artifacts unambiguously indicating its presence: composite figurative objects, such as lion-man; bone needles with an eye; bows and arrows; musical instruments; constructed dwellings; adorned burials suggesting the beliefs in afterlife, and many more.

Multiple types of archaeological artifacts unambiguously associated with prefrontal synthesis appear simultaneously around 65,000 years ago in multiple geographical locations. This abrupt change in imagination has been characterized by historian Yuval Harari as the “cognitive revolution.” Notably, it approximately coincides with the largest Homo sapiens‘ migration out of Africa.

Genetic analyses suggest that a few individuals acquired this prefrontal synthesis ability and then spread their genes far and wide by eliminating other contemporaneous males with the use of an imagination-enabeled strategy and newly developed weapons.

So it’s been a journey of many millions of years of evolution for our species to become equipped with imagination. Most nonhuman mammals have potential for imagining what doesn’t exist or hasn’t happened involuntarily during REM sleep; only humans can voluntarily conjure new objects and events in our minds using prefrontal synthesis.

Andrey Vyshedskiy, Professor of Neuroscience, Boston University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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There we are! As the author of the article says: “Most nonhuman mammals have potential for imagining what doesn’t exist or hasn’t happened involuntarily during REM sleep; only humans can voluntarily conjure new objects and events in our minds using prefrontal synthesis.“

It has been a very long journey for us humans to be equipped with imagination. One wonders what the next ten or twenty years will bring? Any thoughts you want to leave as comments?

Plastics in the ocean

A fascinating insight into recovered plastic.

Like so many others we do our little bit regarding plastic but do not properly think about the issue. I have to admit that I am not even sure if all plastics are harmful or just some.

But I comprehend art!

That is why I am republishing, with permission, this article from The Conversation.

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My art uses plastic recovered from beaches around the world to understand how our consumer society is transforming the ocean

Pam Longobardi amid a giant heap of fishing gear that she and volunteers from the Hawaii Wildlife Fund collected in 2008. David Rothstein, CC BY-ND

Pam Longobardi, Georgia State University

I am obsessed with plastic objects. I harvest them from the ocean for the stories they hold and to mitigate their ability to harm. Each object has the potential to be a message from the sea – a poem, a cipher, a metaphor, a warning.

My work collecting and photographing ocean plastic and turning it into art began with an epiphany in 2005, on a far-flung beach at the southern tip of the Big Island of Hawaii. At the edge of a black lava beach pounded by surf, I encountered multitudes upon multitudes of plastic objects that the angry ocean was vomiting onto the rocky shore.

I could see that somehow, impossibly, humans had permeated the ocean with plastic waste. Its alien presence was so enormous that it had reached this most isolated point of land in the immense Pacific Ocean. I felt I was witness to an unspeakable crime against nature, and needed to document it and bring back evidence.

I began cleaning the beach, hauling away weathered and misshapen plastic debris – known and unknown objects, hidden parts of a world of things I had never seen before, and enormous whalelike colored entanglements of nets and ropes.

Three large plastic art installations, the central one a cornucopia spilling plastic objects onto the floor.
‘Bounty Pilfered’ (center), ‘Newer Laocoön’ (left) and ‘Threnody’ (right). All made of ocean plastic from the Atlantic, Pacific and Gulf of Mexico, installed at the Baker Museum in Naples, Fla., 2022. Pam Longobardi, CC BY-ND

I returned to that site again and again, gathering material evidence to study its volume and how it had been deposited, trying to understand the immensity it represented. In 2006, I formed the Drifters Project, a collaborative global entity to highlight these vagrant, translocational plastics and recruit others to investigate and mitigate ocean plastics’ impact.

My new book, “Ocean Gleaning,” tracks 17 years of my art and research around the world through the Drifters Project. It reveals specimens of striking artifacts harvested from the sea – objects that once were utilitarian, but have been changed by their oceanic voyages and come back as messages from the ocean.

Array of plastic objects, including toys, action figures and fragments of larger objects.
‘Drifters Objects,’ a tiny sample of the plastic artifacts Pam Longobardi has collected from beaches worldwide. Pam Longobardi, CC BY-ND

Living in a plastic age

I grew up in what some now deem the age of plastic. Though it’s not the only modern material invention, plastic has had the most unforeseen consequences.

My father was a biochemist at the chemical company Union Carbide when I was a child in New Jersey. He played golf with an actor who portrayed “The Man from Glad,” a Get Smart-styled agent who rescued flustered housewives in TV commercials from inferior brands of plastic wrap that snarled and tangled. My father brought home souvenir pins of Union Carbide’s hexagonal logo, based on the carbon molecule, and figurine pencil holders of “TERGIE,” the company’s blobby turquoise mascot.

On the 2013 Gyre Expedition, Pam Longobardi traveled with a team of scientists, artists and policymakers to investigate and remove tons of oceanic plastic washing out of great gyres, or currents, in the Pacific Ocean, and make art from it.

Today I see plastic as a zombie material that haunts the ocean. It is made from petroleum, the decayed and transformed life forms of the past. Drifting at sea, it “lives” again as it gathers a biological slime of algae and protozoans, which become attachment sites for larger organisms.

When seabirds, fish and sea turtles mistake this living encrustation for food and eat it, plastic and all, the chemical load lives on in their digestive tracts. Their body tissues absorb chemicals from the plastic, which remain undigested in their stomachs, often ultimately killing them.

Two piles of tiny particles of virtually identical sizes.
Plastic ‘nurdles,’ (left), tiny pellets that serve as raw materials for manufacturing plastic products, and herring roe, or eggs (right). These visually analogous forms exemplify how fish can mistake plastic for food. Pam Longobardi, CC BY-ND

The forensics of plastic

I see plastic objects as the cultural archaeology of our time – relics of global late-capitalist consumer society that mirror our desires, wishes, hubris and ingenuity. They become transformed as they leave the quotidian world and collide with nature. By regurgitating them ashore or jamming them into sea caves, the ocean is communicating with us through materials of our own making. Some seem eerily familiar; others are totally alien.

Two views of a degraded arm from a plastic doll, found on Playa Jaco in Costa Rica.
A degraded plastic doll arm, from the series ‘Evidence of Crimes.’ Pam Longobardi, CC BY-ND

A person engaging in ocean gleaning acts as a detective and a beacon, hunting for the forensics of this crime against the natural world and shining the light of interrogation on it. By searching for ocean plastic in a state of open receptiveness, a gleaner like me can find symbols of pop culture, religion, war, humor, irony and sorrow.

A rolling landscape covered with thousands of life vests.
‘Division Line,’ 2016. This photograph shows the ‘life-jacket cemetary’ in Lesvos, Greece. Traumatized asylum-seekers and migrants arriving by boat from Türkiye leave the life vests on shore as they stagger inland. Most of the waste is plastic. © Pam Longobardi, CC BY-ND

In keeping with the drifting journeys of these material artifacts, I prefer using them in a transitive form as installations. All of these works can be dismantled and reconfigured, although plastic materials are nearly impossible to recycle. I display some objects as specimens on steel pins, and wire others together to form large-scale sculptures.

A plastic bottle cap inscribed 'Endless' and a photograph of a beach littered with plastic objects.
From the series ‘Prophetic Objects,’ a plastic cap from a Greek manufacturer of cleaning products, found on the Greek island of Kefalonia. Pam Longobardi, CC BY-ND

I am interested in ocean plastic in particular because of what it reveals about us as humans in a global culture, and about the ocean as a cultural space and a giant dynamic engine of life and change. Because ocean plastic visibly shows nature’s attempts to reabsorb and regurgitate it, it has profound stories to tell.

A large sculpted anchor in the center of an art gallery, with ties to life preservers mounted on the ceiling.
‘Albatross’ and ‘Hope Floats,’ 2017. Recovered ocean plastic, survival rescue blankets, life vest straps and steel. Pam Longobardi, CC BY-ND

I believe humankind is at a crossroads with regards to the future. The ocean is asking us to pay attention. Paying attention is an act of giving, and in the case of plastic pollution, it is also an act of taking: Taking plastic out of your daily life. Taking plastic out of the environment. And taking, and spreading, the message that the ocean is laying out before our eyes.

Pam Longobardi, Regents’ Professor of Art and Design, Georgia State University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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Pam at one point describes the ocean plastic”… because of what it reveals about us as humans in a global culture, and about the ocean as a cultural space and a giant dynamic engine of life and change …”. It raises questions that I can only ponder the answer. Ultimately, are there too many inhabitants on this planet? What does the next generation think? Is there an answer?

The Role of Dog Fosters

Jess forwards another stirring account of a dog rescuer.

Jess Anderson sent me this video of a Labrador, age 19 no less, being rescued. That is one senior dog!

The video and the supporters who left comments all said how wonderful were their experiences of saving senior dogs.

The video came from the Dodo Foster Diaries and at the time of writing had had nearly 600 viewings.

There is a very good article on PetFinder about the first few days with a senior dog. Go and watch it!

Adding a dog to your life.

A guest post from Penny offers some advice.

Penny Martin has previously written some guest posts for Learning from Dogs and here she is again with today’s post. The subject is not directly about dogs but trying to turn around one’s life; and that is something that most of us have faced up to at some point in their past.

(I think the references to Learning from Dogs are not needed but I’m not Penny!)

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Six Simple Self-Improvement Strategies for Your Health and Career

By Penny Martin,

Published 24th January, 2023.

Are you trying to turn your life around? Focusing on improving your self-care habits, your relationships, and your career prospects can yield change your life for the better. Furthermore, Learning From Dogs can introduce you to all of the benefits of becoming a dog owner! Here’s how to invest in your education, upgrade your resume, explore business ownership, and adopt healthy routines.

Advance Your Education

If you’re looking to move up in your career, you may want to head back to school to earn another degree. It’s okay if you’re not able to commit to attending courses at a physical campus – instead, consider studying through an online degree program. This will allow you to simultaneously work and care for your family. Double-check that any online programs you’re considering are accredited and that you can easily afford the tuition. You can choose a major like marketing, education, information technology, business, healthcare administration, and more.

Update Your Resume

Perhaps you’re hunting for a new job. Make sure to revise and update your resume prior to sending out applications! To make the process easier, just pick out a free resume template from an online library – this free resume may help. Then, you’ll input your work history. Finally, you can spruce up this document with a photo or a color scheme.

Consider Entrepreneurship

What if you’re frustrated with your boss, and you feel like working at a traditional 9-to-5 job is holding you back? If you’ve got a business idea, you can always register for LLC status for limited liability and tax breaks. Remember, if you form an LLC, you’ll have to choose a registered agent who can handle communications regarding your formation documents with law firms, tax agencies, and the government. You can hire a registered agent or service for help in this area.

Health and Fitness

Even as you prioritize your career, it’s still important to take care of your physical and emotional well-being. As you plan out meals each week, The Every Girl recommends cooking with lots of leafy greens and incorporating plant-based protein into your diet. Furthermore, try to block off a few workout sessions per week in your schedule. You might want to sign up for a gym membership.

Pick Up a Good Book

Reading is a great use of your downtime, especially if you’re on a self-improvement journey! Healthline states that reading can reduce your stress levels, prevent cognitive decline, and even alleviate symptoms of depression. Plus, you’ll be able to learn more about topics that you’re interested in! You might want to choose books that cover subjects related to self-help, like nutrition, fitness, meditation, or time management.

If you feel like you don’t have time to read, consider how you could cut down on screen time. Alternatively, you could listen to audiobooks while you commute to work or do chores around the house.

Get a Dog

If you could use another companion, consider getting a dog! Owning a dog can significantly improve your mental health. Canadian Living states that having a dog around actually decreases your blood pressure, boosts your levels of mood-enhancing hormones, and even helps you make friends in your neighborhood – taking your dog for walks helps you connect with other local dog owners!

Self-improvement is a lifelong process. When you take small steps in the right direction, you’ll be able to look back in a year and feel proud of how far you’ve come. With these tips, you can earn another degree, put together an impressive resume, become a pet owner, open your own business, and more!

Are you thinking about getting a dog? Read all about the benefits on Learning from Dogs! Visit the blog today to find out why getting a dog might be right for you.

Photo via Pexels

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Thank you, Penny.

Let me publish again the opening remarks that are on the home page of this blog:

Dogs live in the present – they just are!  Dogs make the best of each moment uncluttered by the sorts of complex fears and feelings that we humans have. They don’t judge, they simply take the world around them at face value.  Yet they have been part of man’s world for an unimaginable time, at least 30,000 years.  That makes the domesticated dog the longest animal companion to man, by far!

Learning from Dogs

I cannot put it better than that!