Category: Technology

Make a leap!

Celestial rhythms

This seemed a rather appropriate post for today, February 29th.

Republished from here within the terms of The Conversation.

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Leap day: fixing the faults in our stars

Author

James Hetrick

Professor of Physics and Analytics, University of the Pacific

The number 2016 divided by 4 equals 504, exactly – with no remainder, which makes the year 2016, like the upcoming years 2020, 2024 and 2028 (and beyond), a leap year. We will get an “extra” day, February 29.

This pattern will repeat until 2100, when the cycle breaks. Though 2100 is exactly divisible by 4, there is an exception – for years whose number is exactly divisible by 100. (On top of that, there’s another exception – for years exactly divisible by 400. So 2400 will be a leap year. Mark your calendars now.)

Where do these quadrennial liberties with our calendar originate?

In the stars, of course.

Celestial rhythms

One of the simplest joys of life is to watch the stars, night after night, month after month, year after year. They become old friends. They spend a season, and then move on. Or rather, it is we who move on – ever advancing around the sun toward next week’s deadlines, new constellations, new fashions and new ideas.

Orion, the annual visitor. Mouser, CC BY-SA

I imagine myself late one night, eight months from now, remembering the overfull recycling bin, at midnight on trash day. As I try to quietly dump wine bottles into the yellow-topped container, there striding over the eastern skyline is Orion. Back again is my ancient friend, telling me that winter is near, and that I have ridden this miraculous rock almost another full lap around my home star. Rigel shimmers its blue-white light, the twinkle in the eye (the knee, actually) of a companion who has visited me, annually, every place on Earth I have lived since childhood. Even to the Southern Hemisphere, the steady Orion came for a summer visit – cartwheeling upside down, feet over hands.

It is from these celestial cycles that our concepts of time originate, and, ultimately, from which we gain the leap day.

The sidereal year is the length of time it takes for the Earth to return to the same place with respect to the “fix’d” and “constant” stars, so that Orion appears exactly in the same place in the sky, at exactly midnight, 365.2563 days later. Stellar friends like that don’t stand you up; they keep their appointments to seven-digit precision (and more).

Right over the equator: A diagram showing the sun’s position relative to the Earth at the vernal equinox. Tfr000, CC BY-SA

Our Western calendar is tied to the tropical year – the time between successive vernal equinoxes. At that moment, the sun’s position in the sky is exactly where the ecliptic (the plane of the solar system and the path that the planets take as they move through the constellations) crosses the celestial equator (the projection of the Earth’s own equator onto the celestial sphere). Straddling the celestial equator, the sun splits its time exactly between the day side and the night side of the Earth. It returns to that place again in roughly 365.24219 days. Roughly.

Now you can see where those alternating “divisible by 4, 100 and 400” leap year rules originate.

Making up the differences

At the end of 365 days, there are still 0.24219 days (just shy of six hours) to go before Earth gets back to the equinox line.

After four years, however, this fractional 0.24219 of a day adds up to 0.96876, which is pretty close to one full day. If we were using only a 365-day calendar, the stars, and more importantly the months, corresponding to the seasons – crucial for agricultural societies – would slip behind. This was apparent to the Romans in the first century, as well as to the Olmecs and the Maya on the other side of the world.

Thus decreed Julius Caesar in 46 B.C.: that every four years an extra day would be added to February. It was called the Julian calendar. But adding one day every four years, in order to make up for that 0.96876 of a day in orbital spare change, is overcompensating. Caesar’s “every four” leap year prescription adds 0.03124 of a day too much. This makes the Julian calendar run fast by just over 600 seconds per year.

Exception after exception: Christopher Clavius, in a line engraving by E de Boulonois. Wellcome Trust, CC BY

Like with the spare coin jar in our house, small change like that takes a while to add up. It wasn’t until the age of Pope Gregory XIII, in 1582, that this mismatch was becoming a problem. After consultation, presumably with God, but particularly with his astronomer, Christopher Clavius, the pope adopted Clavius’ clever solution.

The Julian calendar runs fast by 0.03124 of a day every four years; multiply both sides by 100, and see an excess of about three days after 400 years. Clavius’ solution was to make centuries exceptions – but that would lose too much, four days in 400 years, not three. So Clavius added one back, once every 400 years, starting in 1600.

This Gregorian calendar, which we use today, has the following rules:

Every year divisible by 4: add February 29
Every century (1800, 1900, 2000, 2100): do not add February 29
Every century divisible by 400: add February 29

Still finer measurements

Even with this refinement, there is still orbital change left over. But now we are talking about temporal shavings that are quite small. At this level of precision, other wobbles in the relation of the Earth’s rotational period (the day) and its revolution period (the year) have to be taken into account.

When a leap second is added, digital clocks tick past 23:59:59 but don’t go directly to 00:00:00. Twid

Keeping track of minute effects like this is the job of the International Earth Rotation and Reference Systems Service, which controls the addition (or deletion) of leap seconds. For example, a second was added to Coordinated Universal Time by the service on June 30, 2015, due largely to the slowing of the Earth’s rotation by the gravitational pull of the moon.

There are other sources of calendar slip: the 8.9 magnitude earthquake that triggered the Japanese tsunami on March 11, 2011, for example, shifted the planet’s mass distribution enough to decrease the length of a day by 1.8 microseconds. This will add up to about a second after 1,500 years.

Using that ‘extra’ time

Personally, I think we should make February 29, leap day, a global holiday. It should be considered a gift to ourselves, like taking that accumulated spare change to the grocery store coin-counting machine, and trading it for some easier-to-spend bills. It should be a day of celebration, a reward for saving that quarter of a day over the last four years, to be spent on something frivolous. Or it could be a special day to realign our sense of hourly routines, weekly trash pickups, the race to fulfill monthly quotas, to the celestial schedule.

Without that extra day every fourth year, our ancient friends would begin to miss their annual appointments, and start to fall behind in wishing us prompt birthday greetings, like forgetful Facebook friends. Without February 29, roughly, every four years, the “constant stars” would cease to be constant.

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So there! Now you know!

You all spend this extra day peacefully and happily.

Dogs are dirty – Thank Goodness!

A fascinating new study offering insight into the health of our gut!

It doesn’t take too much imagination to appreciate that living in a house and sharing it with nine dogs and four cats doesn’t lend itself to perfect hygiene! Indeed, just yesterday morning we found evidence of mice in one of our bedroom cabinets. Plus both the bedroom and the main living room are never completely free of fleas, as my skin attests to. Then let’s not even speak of the hair and dust around the house!

Plus we live in a very rural location and the dog traffic in and out of the house is a consequence of our lifestyle choices that we do accept (99% of the time! 😉 ).

But possibly living a healthier life as a consequence of our ‘dirty’ animals was not something that would have ever crossed my mind until now, thanks to a recent essay published over on The Conversation site.

Read it and come to your own conclusion. It is republished within the generous terms of The Conversation; viz:

We believe in the free flow of information. We use a Creative Commons Attribution NoDerivatives licence, so you can republish our articles for free, online or in print.

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If being too clean makes us sick, why isn’t getting dirty the solution?

January 13, 2016 5.59am EST

Author: William Parker, Associate Professor of Surgery, Duke University

Wash up. Riccardo Meneghini/Flickr, CC BY-NC-ND.

Today rates of allergic, autoimmune and other inflammatory diseases are rising dramatically in Western societies. If that weren’t bad enough, we are beginning to understand that many psychiatric disorders, including depression, migraine headaches and anxiety disorders, are associated with inflammation. Perhaps the most startling observation is that our children are afflicted with the same inflammatory problems, contributing to the fact that over 40 percent of US children are on medications for some chronic condition.

And the cause, according to the “hygiene hypothesis,” is that being too clean causes a malformation of the immune system, leading to a wide range of inflammatory diseases. The original idea was that decreased infections in childhood due to hygiene led to a weak immune system, prone to become allergic and inflamed.

If the problem is that we are too clean, then, hypothetically, the issue can be easily resolved. We just need to get dirty, right? Wrong.

Getting dirty doesn’t help our immune system and generally makes inflammation worse. Much worse. That means there is something very wrong with the hygiene hypothesis.

Biodiversity is the real issue

What we actually have is a biodiversity problem. Our clean, indoor-centered lives and a Western diet rich in processed foods have depleted our biomes – the bacteria and worms that naturally live in our bodies, our guts in particular. These organisms play a role in the development and regulation of our immune systems, and scientists have identified the loss of biodiversity as being central to the high rates of inflammatory disease in the developed world.

Giving up soap won’t help your biome. Bar of soap via http://www.shutterstock.com.

The hygiene hypothesis was right…in its day

An increase in inflammatory disorders, like allergies, was first observed about 150 years ago among the aristocracy in Europe, then reached the entire population of the industrialized world by the 1960s, and seems only to have climbed steadily since then.

When trying to understand why inflammatory diseases increased in the late 1800s and throughout the 20th century, scientists put their finger on things such as toilets and water treatment facilities. In those days, having a toilet was “hygiene.”

But times change. After generations of living with toilets and water treatment facilities, some of the wildlife in our bodies has been driven to the point of extinction. Our loss of contact with the soil due to indoor working environments has further depleted the wildlife of our bodies. And the typical Western diet doesn’t help either.

Even if you were to never use soap again for the rest of your life, you would not recover the wildlife your body is missing. Many of the lost organisms of our body don’t exist in North America in the wild, and others you simply won’t come across in your daily life.

On top of tremendous social difficulties imposed by a lack of soap, you’d likely increase your exposure to a lot of aggravating and even dangerous germs. The bacteria and viruses deposited on your shopping cart handle or the light switch at a hotel are generally not good. Those are often the germs of modern society that cause infection and inflammation. Your immune system would remain inflamed, and perhaps be even more agitated than before.

So what exactly are we missing? For practical purposes, it’s important to divide the wildlife of our bodies into two groups: microbes and more complex organisms such as worms. Microbes and worms affect our immune systems in different ways and both are important to be healthy. Biodiversity is the key.

A healthy crop of microbes and a few good worms

What would the gut biomes in our hunter-gatherer ancestors have looked like? A study by Jeffrey Gordon at Washington University in St. Louis showed that people living in modern preindustrial societies had more diverse micriobiome compositions than people living in the United States today. Seventy bacterial species Gordon found in preindustrial people’s biomes were present in very different amounts from those found in the modern U.S. participants.

While each group may have been exposed to different kinds of bacteria in their day-to-day life, the primary reason for the difference in diversity was attributed to diet. The preindustrial folks ate a diet rich in corn and cassava, compared to a U.S. diet rich in animal fat and protein.

And you might think that antibiotics are an issue, but they are usually less of a long-term problem for biodiversity. They can deplete bacteria in the gut microbiome, but the dangerous and disease-inducing tailspin is generally temporary. The microbiome usually recovers quite nicely, for the most part, although some lingering effects can remain.

The second group of organisms that we need are intestinal worms called helminths. These worms are called mutualists, because they benefit from us and we benefit from having them hanging around in our intestines. They used to naturally live in our gut. In fact, only 150 years ago most people in the West had intestinal worms that helped regulate immune function and prevent inflammatory disease. The culprit here isn’t diet, but cleanliness and sanitation.

Eat some fiber. Ali Karimian/Flickr, CC BY-SA.

If getting dirty won’t help your biome, what can you do?

When it comes to bacteria, a healthy diet is the critical ingredient. We can actually achieve a good mixture of gut bacteria very similar to that of our hunter-gatherer ancestors by adopting a good diet high in fiber and low in processed foods. The right diet helps the good bacteria in your gut flourish, and might make it easier for new varieties of good bacteria to take root.

In addition, there are some products that might, in theory, support a more hunter-gatherer-like bacterial flora, by exposing us to the kind of bacteria we don’t encounter anymore, but they haven’t been tested in clinical trials.

Probiotics, generally formulations of bacteria such as bifidobacteria and lactobacilli that grow readily in milk, are safe to use unless patients are severely ill. They could help support biodiversity in our guts if we need to take antibiotics.

Worms are a bit more challenging. There are two schools of thought on how to help helminth-less guts: one is to figure out what makes good worms good for us, and develop a drug that can do the same thing. The other is just to have these good worms living in your intestines.

Personally, I don’t think we can replicate complex biological relationships using a drug. My view is that modern medicine will eventually embrace the actual worm or maybe complex single-celled organisms called protozoans that work the same way, but research in this field is still in the early stages of development.

In the meantime, some intrepid people are going straight for the worm. As in actually acquiring worms in their gut. The challenge for these adventurers is to find a worm that has more benefits than disadvantages.

For instance, the same species of worm can have different effects in different people. The human hookworm, for instance, is commercially available and easily cultured at home. It has been found to treat multiple sclerosis and severe airway hypersensitivity but can also cause severe gastrointestinal distress in many patients.

For now, most individuals interested in immune health will focus on those factors that are risk-free, like avoiding chronic psychological stress, eating well and exercising, and watching out for vitamin D deficiency. These factors, all within our control, are important for avoiding a wide range of inflammation-related diseases, including allergy, autoimmunity, depression and cancer.

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It seems to me that another solution is having more and more dogs and fully embracing them into our lives.

My case rests!

I am what I learn!

Reflections on the old and the new.

So here we are on the last day of 2015, the cusp of a new year and who knows what the next twelve months have in store.

All I am going to do is to reflect on the huge potential our modern ‘wired-up’ world offers for learning.

Most will know the saying, “You can’t teach an old dog new tricks.”

But it is wrong!

Here at home, where a number of the dogs are in their old age (Pharaoh is the equivalent in age of 100 human years; one dog year being approximately the same as eight human years) Jean and I see no difficulty in these elderly dogs learning new tricks. Staying with Pharaoh, as an example, his hearing is pretty poor now but he has learnt a whole range of hand signals in recent months and he still communicates very well with us.

There is much in this new world that concerns me and I know I am not alone with this view. But the rewards of reading the thoughts of others right across the world are wonderful beyond measure.

Here’s a tiny dip into some fascinating items and articles that have graced my in-box in just the last twenty-four hours.

Eckhart Tolle’s Moment Reminder: “As far as inner transformation is concerned, there is nothing you can do about it. You cannot transform yourself, and you certainly cannot transform your partner or anybody else. All you can do is create a space for transformation to happen, for grace and love to enter.”
Val Boyco, “Everything comes to us that belongs to us, if we create the capacity to receive it.” ~ Rabindranath Tagore
John Zande in his Sketches on Atheism, “Theism’s most potent, pervasive, irresistibly enchanting gift to frightened but otherwise sane individuals is a belief—a promise—that upon their death they will go home.”
Mother Nature Network, “7 ways to meditate while you move – If you don’t have time for sitting meditation, give one of these active meditations a try.”
George Monbiot, (on the UK floods), “These floods were not just predictable. They were predicted. There were clear and specific warnings that the management of land upstream of the towns now featuring in the news would lead to disaster.”

and my final selection:

Patrice Ayme: (from an essay on Brain & Consciousness) “The best microprocessors you can buy in a store now can do 10 to the power 11 (10^11; one hundred billions) operations per second and use a few hundred watts,” says Wilfred van der Wiel of the University of Twente in the Netherlands, a leader of the gold circuitry effort. “The human brain can do orders of magnitude more and uses only 10 to 20 watts. That’s a huge gap in efficiency.”

So here’s to a new year of wonderful new learnings. And let me leave you with this additional message for 2016.

Namely that The Nation weekly journal are celebrating their 150 years of publishing the magazine. They recently published a 150th Anniversary edition and the front editorial is written by Katrina Vanden Heuval. There is a ‘break out’ to one side on Page 2 of that editorial that reads:

Change is inevitable, but the one constant in The Nation‘s history has been a faith in what can happen if you tell people the truth.

Finding out the truth and sharing it so we can all see what can happen is my wish for 2016.

Happy New Year to all of you, and to all of your friends and loved ones.

Moments in history

You can blame John Zande for today’s post!

John left an intriguing question as a comment to yesterday’s post.

Oh to have a time machine!

Tell me, Paul, if you did have one, a time machine, what three moments in history would you visit?

It really grabbed Jean and me and we spent quite a few minutes during the day kicking around ideas. At first, it was easy just to do a web search on epic moments in history and see if any of them related to me. But that seemed too easy. So I have picked three that do connect with my life.

May 8th, 1945

I was born on November 8th, 1944. I was born in North London (Acton). It was the period of the Second World War when the V2 rockets were landing all around. Take, for example, the incident just eleven days after my birth, when on the 19th November, 1944 a V2 landed in Wandsworth causing much damage and many fatalities around Hazlehurst Road and Garratt Lane. Spend a moment reviewing who died, and their ages, in that bombing.

So I was precisely six months old when the armistice was announced on May 8th, 1945. As Wikipedia describes it:

Victory in Europe Day, generally known as V-E Day, VE Day or simply V Day was the public holiday celebrated on 8 May 1945 (7 May in Commonwealth realms) to mark the formal acceptance by the Allies of World War II of Nazi Germany’s unconditional surrender of its armed forces.[1] It thus marked the end of World War II in Europe.

On 30 April, Adolf Hitler, the Nazi leader, committed suicide during the Battle of Berlin. Germany’s surrender, therefore, was authorised by his successor, Reichspräsident Karl Dönitz. The administration headed by Dönitz was known as the Flensburg Government. The act of military surrender was signed on 7 May in Reims, France and on 8 May in Berlin, Germany.

I would have loved to witness, by being in the crowd that day, the King and Queen acknowledging the end of the war in Europe.

tdih-may08-HD_still_624x352 — May 8, 1945: King George VI and Queen Elizabeth, with Princess Elizabeth and Princess Margaret, are joined by Prime Minister Winston Churchill.

Nevertheless, that day in May, 1945 has been memorable for me for all of my life. Because my mother, who is still alive today, aged 96, (still living in London but spending Christmas with my sister in Cape Town, by the way), held me in her arms and said aloud: “My dear Paul, you are going to live!” I grew up with those loving words deeply rooted within me.

2. Stonehenge – too many moons ago!

For reasons that I am not entirely clear about, I have always been fascinated by the stars. From the point of view of using the stars to help me navigate strange parts of the world, both on land and at sea. I grew up regarding Polaris, the North Star, almost as a companion. Later in my life when sailing solo from Gibraltar to The Azores, a distance of just under 1,150 nautical miles, on a Tradewind 33 yacht, despite having an early GPS unit it was backup to me using a sextant to maintain (some) awareness of my position.

Tradewind 33 - Songbird of Kent. My home for five years. — Tradewind 33 – Songbird of Kent. My home for five years.

(Reminds me of a anecdote when I was crewing on a privately-owned East Coast Essex fishing smack. I was asking Bill, the owner, why he always laid his thumb on the position on the chart in response to the question, “Where are we?” Bill’s reply: “That’s as accurate as anyone can be!”)

In 1969, when I was driving across the desert plains of Australia, often with inhabited places more than a 150-mile radius away (the Simpson Desert especially coming to mind) the Southern Cross seemed to keep me grounded and remind me that I was making progress.

Back when I was living just outside Totnes in South Devon, my frequent drives up to London along the A303 took me past Stonehenge in Wiltshire.

The December solstice happens at the same instant for all of us, everywhere on Earth. This year the solstice occurs on Tuesday December 22nd at 04:49 GMT (Universal time) with the sun rising over Stonehenge in Wiltshire at 08:04.

THE EARLIEST MONUMENT

It is possible that features such as the Heel Stone and the low mound known as the North Barrow were early components of Stonehenge,[3] but the earliest known major event was the construction of a circular ditch with an inner and outer bank, built about 3000 BC. This enclosed an area about 100 metres in diameter, and had two entrances. It was an early form of henge monument.[4]

Within the bank and ditch were possibly some timber structures and set just inside the bank were 56 pits, known as the Aubrey Holes. There has been much debate about what stood in these holes: the consensus for many years has been that they held upright timber posts, but recently the idea has re-emerged that some of them may have held stones.[5]

Within and around the Aubrey Holes, and also in the ditch, people buried cremations. About 64 cremations have been found, and perhaps as many as 150 individuals were originally buried at Stonehenge, making it the largest late Neolithic cemetery in the British Isles.[6]

Taken from here.

I would have loved being present at Stonehenge when the builders finally were able to stand back and see the Sun “speak” to them at the first Solstice after that point in its construction.

It seems to me to be a most magical place yet Stonehenge offers a mathematical and rhythmic foundation to that magic.

3. First man into space – 12th April, 1961

It was, of course, Yuri Gagarin, who made the first complete orbit of Planet Earth in space.

I would have given anything to be in his seat (and suit). For to look out and see our planet as a small object in an enormous outer space would have to change one’s perception of almost everything; for evermore.

exo-planet-earth-from-space

My wish for the New Year is that we recognise our place both in history and on our Planet Earth, and care for it as the sole, beautiful home that we have.

Now that global recognition would be a moment in history that I would want to experience before I die!

(Thanks John for inspiring me to jot down these thoughts!)

Winter storms!

Apologies to you all!

Our internet service has been down, more or less the last several days.

It was restored some five minutes ago. Apparently down to the fact that our internet provider, Outreach Internet, had to purchase two snowmobiles to get access to the generators powering two of their masts!

The foul weather continues but fingers crossed so does our internet service.

Thus I hope Learning from Dogs returns to “normal service” starting with a new post at midnight PST tonight.

New findings in self-awareness.

For dogs!

We humans take self-awareness for granted. The key measure, as I understand it, is our ability to recognise ourselves, as in a mirror or photograph, for example.

I have more than once mentioned in posts in this place, that the evolutionary journey for us humans and our canine companions has resulted in the two species now sharing a number of psychological and physical ailments.

But what has been implicitly understood is that the one thing that dogs and us do not share is self-awareness. Hitherto, it has been believed that dogs do not recognise themselves in the mirror test.

All of which is an introduction to an item that was recently posted on the ScienceAlert website and was brought to my attention by dear friend Dan Gomez.

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Dogs show signs of self-consciousness in new ‘sniff test’
We knew it!

BEC CREW 10 DEC 2015

Self-awareness might seem like the most basic part of life to us humans, but it’s a surprisingly rare concept when it comes to other animals. While great apes, dolphins, orcas, rhesus macaques, Eurasian magpies, and a single Asiatic elephant have all passed the self-recognition test, everything from pandas and pigeons to sea lions, gorillas, and several species of monkey have failed to show signs of consciousness.

Dogs were also on that list of failures – until now. Traditionally, self-consciousness is evaluated via the ‘mirror test’. If an animal uses its own reflection to examine or touch a red mark that’s been applied to its body without its knowledge, scientists can confirm that they possess some sense of self. But what if the animal isn’t that visually oriented?

“I believed that because dogs are much less sensitive to visual stimuli with respect to what, for example, humans and many apes are, it is likely that the failure of this and of other species in the mirror test is mainly due to the sensory modality chosen by the investigator to test the self-awareness and not, necessarily, to the absence of this latter,” says evolutionary biologist Roberto Cazzolla Gatti from Tomsk State University in Russia.

Gatti was prompted into this line of thinking by the fact that in past mirror tests, dogs have shown no interest in looking at their reflection in the mirror, but they will go ahead and sniff the area and possibly even urinate around it. While this got them a big old “fail” in previous studies, Gatti thought the behaviour warranted a closer look.

Back in 2001, renowned animal behaviour expert, Marc Bekoff, investigated the ‘mirror sniffing’ phenomenon via an experiment dubbed the ‘yellow snow test’. Yep it’s exactly what it sounds like. Over a five-year period, Bekoff took his dog Jethro on walks during the winter months, and timed how long he would sniff clumps of snow soaked in his own or other dogs’ urine.

The AnimalWise blog explains:

“Bekoff would wait until Jethro or other known female and male dogs urinated on snow, and then scoop up the clump of yellow snow as soon as Jethro was elsewhere and did not see him pick it up or move it (Bekoff used clean gloves each time and took other precautions to minimise odour and visual cues).

Bekoff then moved the yellow snow varying distances down the path so that Jethro would run across the displaced urine: (i) within about 10 seconds, (ii) between 10 and 120 seconds later, or (iii) between 120 and 300 seconds later. After Jethro arrived, Bekoff recorded how long he sniffed at the yellow snow, whether he urinated over it using the typical male raised-leg posture, and whether urination immediately followed the sniffing (‘scent marking’).”

Not surprisingly, Jethro paid a lot less attention to his own urine than he did to that of other dogs, so Bekoff concluded that his pet had to have some sense of self to be able to distinguish between scents. But with a sample size of one, the experiment wasn’t exactly going to set the scientific community on fire.

Gatti decided to come up with something a little more convincing. Called the Sniff Test of Self-Recognition (STSR), the experiment involved collecting urine samples from four stray dogs and systematically exposing them to the scents. He repeated this four times a year at the beginning of every season.

“I placed within a fence five urine samples containing the scent of each of the four dogs and a ‘blank sample’, filled only with cotton wool odourless,” he says. “The containers were then opened and each dog was individually introduced to the inside of the cage and allowed to freely move for 5 minutes. The time taken by each dog to sniff each sample was recorded.”

Just like Jethro, each dog spent way more time smelling the urine samples of other dogs than their own, which supports the hypothesis that they know their own scent and aren’t that interested in it. The result was stronger the older the dog, which suggests that self-awareness develops with age.

It might seem obvious that dogs would know their own scent, but if you’ve ever seen a dog bark at its own reflection, or completely ignore it – totally unaware of its own appearance and movements – you can see the significance.

“I demonstrated that even when applying it to multiple individuals living in groups and with different ages and sexes, this test provides significant evidence of self-awareness in dogs and can play a crucial role in showing that this capacity is not a specific feature of only great apes, humans, and a few other animals, but it depends on the way in which researchers try to verify it,” says Gatti.

The findings are published in the journal Ethology, Ecology and Evolution.

Now, I know what you’re thinking: that sample size of four is pretty crap. And yep, it is, so we can’t really call this an official “pass” just yet. But the fact that we may well need to rethink the mirror test and figure out how to better align it with how certain species see the world is certainly worthy of a proper investigation. Certain behaviours such as empathy have been linked to self-awareness, and thanks to the ‘yawn test’, there’s evidence that dogs feel empathy towards their owners.

We’ll just have to wait and see if scientists are prepared to conduct a giant yellow snow test to put this conundrum to bed once and for all. In the meantime, here’s dolphins passing the mirror test adorably:

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Speaking of self-awareness, today, December 12th, is the centenary of the birth of Frank Sinatra.

Photo of Frank SINATRA, posed, c.early 1960s (Photo by GAB Archive/Redferns)

KAJO author interview

Would love you to listen to this.

kajo_2015

In exactly twenty-four hours from now, you will have the opportunity to listen to Kyle Dunlap of the radio station KAJO interviewing me about my book: Learning from Dogs.

The interview, that was pre-recorded on the 23rd November, is part of KAJO’s community broadcasts where they speak to local authors. As a newbie author, I was delighted and flattered to be asked to participate.

Anyway!

The broadcast is a little after 12:45 Pacific Standard Time on Tuesday, 8th December. If you are not in the USA, you can check the equivalent time easily at The World Clock website.

It is being broadcast live on KAJO’s website

You will see the On Air button to click just to the right of the KAJO 1270am logo. Here is the “Click to Listen Live” button grabbed from the KAJO website at 3:20pm yesterday.

on_air_rain

It will have Kyle Dunlap’s name on it when you “tune in” at 12:45 tomorrow.

If you do listen to the interview do leave a comment below – good or bad! 😉

The power of dog’s spit!

What clues does your dog’s spit hold for human mental health?

This is not a spoof. Apparently the closeness of the relationship between dogs and humans holds real scientific value.

Just my way of introducing a most fascinating and interesting item that recently appeared on The Conversation blogsite. (And see my note at the end of today’s post.)

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What clues does your dog’s spit hold for human mental health?

December 2, 2015

Elixir Karlsson, Assistant Professor of Bioinformatics and Integrative Biology, University of Massachusetts Medical School

There goes some precious DNA…. Graeme Bird, CC BY-NC-ND

Dogs were the first animals people domesticated, long before the earliest human civilizations appeared. Today, tens of thousands of years later, dogs have an unusually close relationship with us. They share our homes and steal our hearts – and have even evolved to love us back. Sadly, they also suffer from many of the same difficult-to-treat psychiatric and neurological diseases we do.

I learned this firsthand about six years ago, when my sister Adria adopted Beskow, a beautiful,

Beskow, in fine spirits. Elinor Karlsson, CC BY-ND

boisterous, black and white mutt. Beskow became my constant companion on my morning runs along the Charles River. Her joy in running was obvious to everyone we passed, and she kept me going mile after mile.

When not running, though, Beskow suffered from constant anxiety that left her stressed and unhappy – on edge around other dogs and prone to aggressive behavior. Beskow had trouble even playing outdoors, since she was compelled to attend to every sound and movement. Working one-on-one with skilled behaviorists and trainers helped immensely, but poor Beskow still never seemed able to relax. Eventually, Adria combined the intensive training with medication, which finally seemed to give Beskow some relief.

Beskow’s personality – her intelligence, her focus and her anxiety – was shaped not only by her own life experiences, but by thousands of years of evolution. Have you ever known a dog who would retrieve the same ball over and over again, for hours on end? Or just wouldn’t stay out of the water? Or wasn’t interested in balls, or water, but just wanted to follow her nose? These dogs are the result of hundreds of generations of artificial selection by human beings. By favoring useful behaviors when breeding dogs, we made the genetic changes responsible more common in their gene pool.

When a particular genetic change rapidly rises in prevalence in a population, it leaves a “signature of selection” that we can detect by sequencing the DNA of many individuals from the population. Essentially, around a selected gene, we find a region of the genome where one particular pattern of DNA – the variant linked to the favored version of the gene – is far more common than any of the alternative patterns. The stronger the selection, the bigger this region, and the easier it is to detect this signature of selection.

In dogs, genes shaping behaviors purposely bred by humans are marked with large signatures of selection. It’s a bit like evolution is shining a spotlight on parts of the dog genome and saying, “Look here for interesting stuff!” To figure out exactly how a particular gene influences a dog’s behavior or health, though, we need lots more information.

To try to unravel these connections, my colleagues and I are launching a new citizen science research project we’re calling Darwin’s Dogs. Together with animal behavior experts, we’ve put together a series of short surveys about everything from diet (does your dog eat grass?) to behavior (is your dog a foot sitter?) to personality (is your dog aloof or friendly?).

Any dog can participate in Darwin’s Dogs, including purebred dogs, mixed breed dogs, and mutts of no particular breed – our study’s participants will be very genetically diverse. We’re combining new DNA sequencing technology, which can give us much more genetic information from each dog, with powerful new analysis methods that can control for diverse ancestry. By including all dogs, we hope to be able to do much larger studies, and home in quickly on the important genes and genetic variants.

A beagle considers making the saliva donation. Stephen Schaffner, CC BY-ND

Once an owner has filled out the survey, there’s a second, crucial step. We send an easy-to-use kit to collect a small dog saliva sample we can use for DNA analysis. There’s no cost, and we’ll share any information we find.

Our plan is to combine the genetic data from many dogs and look for changes in DNA that correlate with particular behaviors. It won’t be easy to match up DNA with an obsession with tennis balls, for instance. Behavior is a complex trait that relies on many genes. Simple Mendelian traits, like Beskow’s black and white coat, are controlled by a single gene which determines the observable characteristic. This kind of inherited trait is comparatively easy to map. Complex traits, on the other hand, may be shaped by tens or even hundreds of different genetic changes, each of which on its own only slightly alters the individual carrying it.

Adding to the complexity, environment often plays a big role. For example, Beskow may not have been as anxious if she’d lived with Adria from puppyhood, even though her genetics would be unchanged.

Darwin’s Dogs team member Jesse McClure extracts DNA from a sample. Elinor Karlsson, CC BY-ND

To succeed, we need a lot of dogs to sign up. Initially, we’re aiming to enroll 5,000 dogs. If successful, we’ll keep growing. With bigger sample sizes, we’ll be able to tackle even more complex biological puzzles.

This is a huge effort, but could offer huge rewards. By figuring out how a genetic change leads to a change in behavior, we can decipher neural pathways involved in psychiatric and neurological diseases shared between people and dogs. We already know these include not just anxiety, but also PTSD, OCD, autism spectrum disorders, phobias, narcolepsia, epilepsy, dementia and Alzheimer’s disease.

Understanding the biology underlying a disease is the first step in developing more effective treatments – of both the canine and human variety. For example, genetic studies of narcolepsy in Doberman pinschers found the gene mutation causing the disease – but only in this one dog population. Researching the gene’s function, though, led to critical new insights into the molecular biology of sleep, and, eventually, to new treatment options for people suffering from this debilitating disease.

Darwin’s Dogs is investigating normal canine behaviors as well as diseases. We hypothesize that finding the small genetic changes that led to complex behaviors, like retrieving, or even personality characteristics, like playfulness, will help us figure out how brains work. We need this mechanistic understanding to design new, safe and more effective therapies for psychiatric diseases.

And Beskow? Six years later, she is as wonderful as ever. While still anxious some of the time, the

Beskow with one of her loving family members. Adria Karlsson, CC BY-ND

medication and training have paid off, and she enjoys her daily walks, training and playtime. She still gets very nervous around other dogs, but is a gentle, playful companion for my sister’s three young children.

We are now sequencing her genome. In the next few months, we should have our first glimpse into Beskow’s ancestry. We know she is a natural herder, so we’re curious to find out how much her genome matches up to herding breeds, and which genes are in that part of the genome.

Of course, we can’t figure out much from just one dog – if you are a dog owner, please enroll your dog today!

ooOOoo

This is an incredibly interest research project with far-reaching implications for us humans. I have written to Professor Karlsson to double-check that anyone who reads this can participate, even if living outside the USA, and will update this post as soon as I hear back from her.

Do share this as far and wide as you can for the benefits for us humans are clear and obvious.

Not a week goes by without me gaining more and deeper understanding of just how wonderful and fabulous our dogs are.

Changes to the Blog

No! It’s not your eyes! 😉

I should have sent this out earlier to you all.

For a few hours ago the WordPress theme I am using on Learning from Dogs was changed.

The change is necessary to allow a number of eCommerce features to be added to the blog in connection with me being able to sell my book, both in paperback and eBook formats, directly to you good people.

Plus there’s a real bonus.

This theme is mobile friendly.

In other words, everything on Learning from Dogs will be much, much easier to read on tablets and smartphones.

Finally, if anyone is within reach of Grants Pass then you have a warm welcome to come along on Saturday, December 12th. There will be some specials available to visitors only.

What a show of fireworks this would be!

Asteroid 2015 TB145 will pass by Planet Earth – just!

Back in my old country, Halloween is not celebrated in the same style that it is here in America. The Brits tend to favour the evening of November 5th and Guy Fawkes Night. That evening, Bonfire Night, sees fireworks parties in many places.

However, if one starts to think of the dimensions and distances of outer space then our planet is just being spared the firework show to beat all other shows.

I’m referring to Asteroid TB145, a huge asteroid, that will pass Earth at 310,000 miles (498,896 km) or 1.3 times the Earth-moon distance.

UPDATE OCTOBER 30, 2015. A newly found asteroid of notable size – known as asteroid 2015 TB145 – will safely pass Earth on October 31, 2015, according to clocks in North America. It should be visible moving in front of the stars, with the help of a telescope, tonight (October 30). It is the biggest known asteroid that will come this close to Earth until 2027. The asteroid – found as recently as October 10 – will fly past Earth at a safe distance, or about 1.3 times the moon’s distance. Closest approach to Earth will be October 31 at 1 p.m. EDT (1700 UTC). Translate to your time zone here.

Paul Chodas, manager of the Center for Near Earth Object Studies at NASA’s Jet Propulsion Laboratory, Pasadena, California, said:

The trajectory of 2015 TB145 is well understood. At the point of closest approach, it will be no closer than about 300,000 miles – 480,000 kilometers or 1.3 lunar distances. Even though that is relatively close by celestial standards, it is expected to be fairly faint, so night-sky Earth observers would need at least a small telescope to view it.

So how big is this asteroid?

Scientists are continuing to estimate the size at 1,300 feet (400 meters) wide.

If the size is correct, the new found asteroid is 28 times bigger in diameter than the Chelyabinsk meteor that penetrated the atmosphere over Russia in February, 2013. An incoming asteroid’s potential to do damage on Earth depends on various factors, including its size, its angle of entry, and the point on Earth over which it enters the atmosphere. The shock wave from the 2013 Chelyabinsk meteor broke windows and did other damage to some 7,200 buildings in six Russian cities. Some 1,500 people were injured seriously enough to seek medical treatment, mainly from broken glass from windows.

For those of you that want to catch a glimpse of TB145, then:

Asteroid position at 3:50 a.m. ET (0750 UTC) Point a Go To computerized telescope to HIP 24197 or SAO 94377) a naked-eye star with a magnitude of 5 in Orion. At 3:50 a.m. ET on October 31 (Saturday morning), the space rock passes close to this star. The asteroid will appear as a slowly moving ‘star’ passing very close to this star. By this time the asteroid should appear to move faster because it will be closer to Earth than earlier on the night of October 30. This illustration shows a half degree field of view (about the size of a full moon). A pair of double stars visible in this area should confirm you are pointing at the correct direction. Alternatively, you can point your telescope to these coordinates: RA 05h 11m 41.6s / DEC +16º 02′ 44.5″. Illustration by Eddie Irizarry using Stellarium.

Full details and answers to most of your questions may be found here.

All I can say is I hope the number crunchers have got their sums right!

If not, then it’s goodnight from her and goodnight from me.

It was nice knowing you all!

P.S. If you think this is all a bit far-fetched, then this video sent to me by Dan Gomez will bring you down to earth.

Leap day: fixing the faults in our stars

Author

Celestial rhythms

Making up the differences

Still finer measurements

Using that ‘extra’ time

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Dogs show signs of self-consciousness in new ‘sniff test’ We knew it!

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What clues does your dog’s spit hold for human mental health?

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Dogs show signs of self-consciousness in new ‘sniff test’
We knew it!