“This is far ahead of my knowledge of science. I applaud you for writing this despite me not understanding it”
So it may seem a little strange that I now publish the following. It was published originally on Skeptic. It is quite a long video but, please, settle down and watch it.
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Sean Carroll is creating a profoundly new approach to sharing physics with a broad audience, one that goes beyond analogies to show how physicists really think. He cuts to the bare mathematical essence of our most profound theories, explaining every step in a uniquely accessible way.
Quantum field theory is how modern physics describes nature at its most profound level. Starting with the basics of quantum mechanics itself, Sean Carroll explains measurement and entanglement before explaining how the world is really made of fields. You will finally understand why matter is solid, why there is antimatter, where the sizes of atoms come from, and why the predictions of quantum field theory are so spectacularly successful. Fundamental ideas like spin, symmetry, Feynman diagrams, and the Higgs mechanism are explained for real, not just through amusing stories. Beyond Newton, beyond Einstein, and all the intuitive notions that have guided homo sapiens for millennia, this book is a journey to a once unimaginable truth about what our universe is.
Sean Carroll is Homewood Professor of Natural Philosophy at Johns Hopkins University, and Fractal Faculty at the Santa Fe Institute. He is host of the Mindscape podcast, and author of From Eternity to Here, The Particle at the End of the Universe, The Big Picture, and Something Deeply Hidden. He has been awarded prizes and fellowships by the National Science Foundation, NASA, the American Institute of Physics, the Royal Society of London, and many others. He lives in Baltimore with his wife, writer Jennifer Ouellette. His new book series, The Biggest Ideas in the Universe, includes one volume on Space, Time, and Motion, and this new volume on Quanta and Fields.
Shermer and Carroll discuss:
the measurement problem in physics
wave functions
entanglement
fields
interactions
scale
symmetry
gauge theory
phases
matter
atoms
What is time?
Is math all there is? Is math universal?
double-slit experiment
superposition
metaphors in science
limitations of models and theories of reality
What banged the Big Bang?
Why is there something rather than nothing?
Second Laws of Thermodynamics and directionality in nature
Is there a place for God in scientific epistemology?
many interpretations of quantum mechanics
multiple dimensions and the multiverse
string theory and the multiverse
known unknowables: Are there things we can never know, even in principle?
God
hard problem of consciousness
free will/determinism.
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I’m assuming you have watched the video because in a world that is pre-occupied with the trivial this is just the opposite. Sean shares his physics in a profoundly different and powerful way!
There is no shortage of glorious stories about dogs, and thank goodness for that! Recently I saw an article on The Dodo about a dog and I wanted to share it with you.
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Dog Dumped In Desert Finds Construction Site — Then Begs Workers To Save Her
When Jeanean Gillespie clocked into work at a construction site earlier this month, she expected to see the usual handful of people around. Her office, located on an uninhabited stretch of desert, managed the new housing developments being built — and no one, other than her team of workers, was authorized to be there.
So when she saw two tiny eyes peering at her through her office doorway that morning, she jumped. The tiny pup had seemingly shown up out of nowhere, and she was desperate for someone to see her.
Suzette Hall
“She wanted to be noticed, she wanted help,” Suzette Hall, founder of Logan’s Legacy 29, wrote on Facebook. “Thank goodness my dear, dear friend, Jeanean Gillespie, worked there.”
Gillespie’s heart dropped when she realized the little dog, later named Sage, was all alone in the dangerous desert. With bobcats and coyotes lurking nearby, Gillespie knew time was of the essence to save Sage.
The compassionate worker tried repeatedly to capture Sage, but the scared pup ran away every time. After a few failed attempts, Gillespie called Hall for backup and placed food and water by the door for her in the meantime.
Suzette Hall
Sage was frightened by her new friends, but she still felt safe in their care. As they came up with a rescue plan, Sage figured out how to get as close as possible to them while still keeping her distance.
“She would sleep outside the office doors at night,” Hall wrote. “They all tried to help her, but she wouldn’t let anyone get close.”
Suzette Hall
Gillespie tried gaining Sage’s trust each day and eventually lured her inside the office. Hall arrived soon after, and the experienced rescuer recognized Sage’s demeanor instantly.
“When I got there, she was so scared, but she wanted to surrender so bad,” Hall said. “She was exhausted.”
Suzette Hall
Hall calmed the skittish dog and successfully scooped her up shortly after arriving. As scared as Sage was, she instantly felt comforted in Hall’s arms.
“[W]ithin minutes, she melted safely into my arms,” Hall wrote. “She knew she was safe from loneliness …”
Suzette Hall
Gillespie waved goodbye to the resilient pup as Hall loaded her into the car and drove off to Camino Pet Hospital. After days of surviving on her own in the desert, Sage got some much-needed rest.
“She fell fast asleep on the drive back,” Hall said. “She closed both eyes for the first time in days. She was rescued and she knew it.”
Suzette Hall
It’s been a couple of weeks since Sage’s rescue, and the survivor pup is still recovering from the ordeal. Aside from needing a growth removed, a dental cleaning and a spay, Sage is overall healthy. But her spirit is still broken.
“Poor Sage is not feeling well … her blood work came back normal, but she is just so sad,” Hall told The Dodo. “She needs love. She is just longing for it.”
Suzette Hall
Sage is scheduled for surgery soon, and Hall hopes to find her an amazing family once she’s feeling better. Until then, she’ll keep showering Sage with the love she’s always deserved.
“She’s such a sweet baby,” Hall said.
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I just love stories like this one. Sweet, sweet Sage!
Dogs in many ways are just like us humans. Scared of being alone and rejected but always deserving of love. Perfect!
The Westminster Dog Show this year ran from Saturday, 11th May until Tuesday, 14th May.
Christine Longnecker, a horseback riding instructor, rescued Miles from a Pennsylvania shelter. After discovering his love of jumping, she began training Miles for agility competitions.
Many wonderful dogs of all types but this ex-rescue dog, Miles, takes the cake!
But the winner was a miniature poodle called Sage.
EVENT: A coronal mass ejection (CME) is an eruption of solar material. When they arrive at Earth, a geomagnetic storm can result. Watches at this level are very rare. TIMING: Several CMEs are anticipated to merge and arrive at Earth on May 12th. EFFECTS: The general public should visit our webpage to keep properly informed. The aurora mav become visible over much of the northern half of the country, and maybe as far south as Alabama to northern California.
Meanwhile, Earth.com presented the following (and it is a long but extremely interesting report):
Update: New solar flare, secondary peak today in this “Extreme” solar storm
The Sun released another powerful burst of energy today, known as a solar flare, reaching its peak intensity at 12:26 p.m. Eastern Time. The flare originated from a region on the Sun’s surface called sunspot Region 3664, which has been quite active lately.
NASA’s Solar Dynamics Observatory, a spacecraft that keeps a constant eye on our nearest star, was able to capture a striking image of this latest solar outburst.
Solar flares are immense explosions on the Sun that send energy, light and high speed particles into space. They occur when the magnetic fields in and around the Sun reconnect, releasing huge amounts of stored magnetic energy. Flares are our solar system’s most powerful explosive events.
The NOAA’s Space Weather Prediction Center (SWPC) has extended the Geomagnetic Storm Warning until the afternoon of May 13, 2024.
Understanding different classes of solar flares
Today’s flare was classified as an X1.0 flare. Solar flares are categorized into classes based on their strength, with X-class flares being the most intense. The number provides additional information about the flare’s strength within that class. An X1 flare is ten times more powerful than an M1 flare.
These energetic solar eruptions can significantly impact Earth’s upper atmosphere and near-Earth space environment. Strong flares can disrupt high-frequency radio communications and GPS navigation signals. The particle radiation and X-rays from flares can also pose potential risks to astronauts in space.
Additionally, the magnetic disturbances from flares, if particularly strong, have the ability to affect electric power grids on Earth, sometimes causing long-lasting blackouts.
However, power grid problems are more commonly caused by coronal mass ejections (CMEs), another type of powerful solar eruption often associated with strong flares.
Scientists are always on alert, monitoring the Sun for these explosive events so that any potential impacts can be anticipated and prepared for. NASA’s Solar Dynamics Observatory, along with several other spacecraft, help provide this early warning system.
Stay tuned to Earth.com and the Space Weather Prediction Center (SWPC) for updates.
Update — May 12, 2024 at 9:41 AM EDT
The ongoing geomagnetic storm is expected to intensify later today, Sunday, May 12, 2024. Several intense Coronal Mass Ejections (CMEs), traveling from the Sun at speeds up to 1,200 miles per second, are anticipated to reach the Earth’s outer atmosphere by late afternoon.
Over the past two days, preliminary reports have surfaced regarding power grid irregularities, degradation of high-frequency communications, GPS outages, and satellite navigation issues. These disruptions are likely to persist as the geomagnetic storm strengthens.
Auroras visible across the continental United States
Weather permitting, auroras will be visible again tonight over most of the continental United States. This spectacular display of lights is a direct result of the ongoing geomagnetic storm.
The threat of additional strong solar flares and CMEs, which ultimately result in spectacular aurora displays, will persist until the large and magnetically complex sunspot cluster, NOAA Region 3664, rotates out of view of the Earth. This is expected to occur by Tuesday, May 14, 2024.
Solar activity remains at moderate to high levels
Solar activity has been at moderate levels over the past 24 hours. Region 3664 produced an M8.8/2b flare, the strongest of the period, on May 11 at 15:25 UTC. A CME signature was observed, but an Earth-directed component is not suspected.
Solar activity is expected to remain at high levels from May 12-14, with M-class and X-class flares anticipated, primarily due to the flare potential of Region 3664.
Energetic particle flux and solar wind enhancements
The greater than 10 MeV proton flux reached minor to moderate storm levels on May 10. Additional proton enhancements are likely on May 13-14 due to the flare potential and location of Region 3664.
The solar wind environment has been strongly enhanced due to continued CME activity. Solar wind speeds reached a peak of around 620 miles/second on May 12 at 00:55 UTC.
A strongly enhanced solar wind environment and continued CME influences are expected to persist on May 12-13, and begin to wane by May 14.
Geomagnetic field reaches G4 “Severe” storm levels
The geomagnetic field reached G4 (Severe) geomagnetic storm levels in the past 24 hours due to continued CME activity.
Periods of G3 (Strong) geomagnetic storms are likely, with isolated G4 levels possible, on May 12. Periods of G1-G3 (Minor-Strong) storming are likely on May 13, and periods of G1 (Minor) storms are likely on May 14.
Stay informed and enjoy the light show
As the geomagnetic storm rages on, we must remain vigilant and prepared for the potential consequences. Monitor official sources for updates on the storm’s progress and any further disruptions to our technological infrastructure.
Take a moment to step outside tonight and marvel at the incredible auroras painting the night sky — a stunning reminder of the raw power and beauty of our Sun.
While these solar storms can cause temporary inconveniences, they also provide us with an opportunity to reflect on our place in the universe and the awe-inspiring forces that shape our world.
Stay tuned to Earth.com and the Space Weather Prediction Center (SWPC) for updates.
Understanding geomagnetic solar storms
Geomagnetic storms are disturbances in the Earth’s magnetic field caused by the interaction between the solar wind and the planet’s magnetosphere. These storms can have significant impacts on technology, infrastructure, and even human health.
Causes of geomagnetic storms
Geomagnetic storms typically originate from the Sun. They are caused by two main phenomena:
Coronal Mass Ejections (CMEs): Massive bursts of plasma and magnetic fields ejected from the Sun’s surface.
Solar Flares: Intense eruptions of electromagnetic radiation from the Sun’s surface.
When these events occur, they send charged particles streaming towards Earth at high speeds, which can take anywhere from one to five days to reach our planet.
Effects on Earth’s magnetic field
As the charged particles from CMEs and solar flares reach Earth, they interact with the planet’s magnetic field. This interaction causes the magnetic field lines to become distorted and compressed, leading to fluctuations in the strength and direction of the magnetic field.
Impacts on technology and infrastructure
Geomagnetic storms can have significant impacts on various aspects of modern technology and infrastructure:
Power Grids: Strong geomagnetic storms can induce currents in power lines, causing transformers to overheat and potentially leading to widespread power outages.
Satellite Communications: Charged particles can damage satellite electronics and disrupt communication signals.
GPS and Navigation Systems: Geomagnetic disturbances can interfere with the accuracy of GPS and other navigation systems.
Radio Communications: Storms can disrupt radio signals, affecting communication systems that rely on HF, VHF, and UHF bands.
As charged particles collide with Earth’s upper atmosphere, they excite oxygen and nitrogen atoms, causing them to emit light in various colors.
Monitoring and forecasting
Scientists continuously monitor the Sun’s activity and use various instruments to detect and measure CMEs and solar flares.
This data helps them forecast the timing and intensity of geomagnetic storms, allowing for better preparedness and mitigation of potential impacts.
Historical geomagnetic storms
Some of the most notable geomagnetic storms in history include:
The Carrington Event (1859): The most powerful geomagnetic storm on record, which caused widespread telegraph system failures and auroras visible as far south as the Caribbean.
The Halloween Storms (2003): A series of powerful geomagnetic storms that caused power outages in Sweden and damaged transformers in South Africa.
The Quebec Blackout (1989): A geomagnetic storm that caused a massive power outage affecting millions of people in Quebec, Canada.
Understanding geomagnetic storms is crucial for protecting our technology-dependent world and mitigating the potential risks associated with these powerful space weather events.
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I have no excuse for not being better at looking after my teeth, for one of my elder sisters, Corinne, was a dental assistant and when I was in my mid-fifties I moved down to South-West England and bought a home just a few miles from Corinne’s home. Thereafter she looked after my teeth at the dental practice in Totnes.
But I was careless in following Corinne’s advice and it wasn’t until in my seventies, and living in Merlin, Oregon, that I saw the light; so to speak!
Read this!
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Healthy teeth are wondrous and priceless – a dentist explains why and how best to protect them
Yet, in a society where 1 out of 5 Americans ages 75 and up live without their teeth, many people may not realize that teeth are designed to stay with us for a lifetime.
In the process, I have developed reverence for natural teeth and for the complex beauty of these biological and mechanical masterpieces.
Designed for lifelong function
The secret of teeth longevity lies in their durability as well as in how they are anchored to the jaw – picture a hammer and its hand grip. For each tooth, durability and anchorage are functions of the complex interface between six different tissues; each alone is a biological marvel.
For anchorage, the cementum, ligament and bone grip the tooth at its root portion that is buried under the gum. The ligament, a soft tissue that is about 0.2 millimeters wide (about the diameter of four hairs), attaches the cementum of the root on one end to the bone of the jaw on the other end. It serves to anchor the tooth as well as to cushion its movement during chewing.
For durability, however, the secret lies in the enamel, dentin and pulp – our focus in this discussion.
The enamel is the protective shell that covers the visible part of the tooth above the gum. Thanks to its high mineral content, enamel is the hardest tissue in the body. It needs to be, since it acts as a shield against the constant impact of chewing.
Enamel does not contain cells, blood vessels or nerves, so it is nonliving and nonsensitive. Enamel is also non-regenerating. Once destroyed by decay or broken by misuse such as ice chewing, nail biting or bottle opening – or touched by the dental drill – that part of our priceless enamel is gone for good.
Because it interfaces with a germ-laden world, the enamel is also where decay starts. When acid-generating bacteria accumulate on unbrushed or poorly brushed teeth, they readily dissolve the minerals in the enamel.
How bacteria invade the teeth and cause cavities.
Like hair or fingernails, the non-innervated enamel is not sensitive. The decay advances through the 2.5-millimeter thick (tenth of an inch) layer of enamel painlessly. When caught at that phase during a dental checkup visit, the dentist can treat the decay with a relatively conservative filling that hardly compromises the tooth’s structural integrity.
Because of its high mineral content, enamel is stiff. Its lifelong support is provided by the more resilient infrastructure – the dentin.
Dentin and pulp – body and heart
With less mineral content than enamel, dentin is the resilient body of the tooth. It is a living tissue formed of parallel tiny tubes housing fluid and cellular extensions. Both originate from the pulp.
The pulp is the tooth’s soft tissue core. Vastly rich in cells, blood vessels and nerves, it is the life source of the tooth – its heart – and the key to its longevity.
Like smoke detectors communicating with a remote fire station, the cellular extensions within the dentin sense decay as soon as it breaks through the nonsensitive layer of enamel into dentin. Once the extensions communicate the danger signal to the pulp, our tooth sensitivity alarm goes off: The tooth heart is in flames.
The inflamed pulp initiates two protective actions. The first is to secrete an additional layer of dentin to delay the approaching attack. The second is toothache, a call to visit the dentist.
The earlier the visit, the less the drilling and the smaller the filling. If caught in time, most of the tooth’s natural tissues will be preserved and the pulp will likely regain its healthy state. If caught too late, the pulp slowly dies out.
Without its heart, a nonliving tooth has no defense against further decay invasion. Without a hydration source, a dried-out dentin will sooner or later break under the forces of constant chewing. Besides, a tooth that has already lost a significant portion of its natural structure to decay, cavity preparation or root canal instrumentation becomes weak, with limited longevity.
In other words, the tooth is never the same without its heart. Pulpless, the tooth loses its womb-to-tomb endurance and mother nature’s lifelong warranty.
The tooth coming together
More complex – and more precious – than a pearl within an oyster, the formation of a tooth within our jawbone involves layered mineral deposition. As tooth development progresses in a process of ultimate cellular engineering, the cells of the six aforementioned tissues – enamel, dentin, pulp, cementum, ligament and bone – multiply, specialize and mineralize synchronously with each other to form uniquely interlocking interfaces: enamel to dentin, dentin to pulp, cementum to dentin and cementum to ligament to bone.
In a progress akin to 3D printing, the tooth crown grows vertically to full formation. Simultaneously, the root continues its elongation to eventually launch off the crown from within the bone across the gum to appear in the mouth – the event known as teething. It is about that time, around 12 years of age, that our set of adult teeth is complete. These pearls are set to endure a lifetime and are undoubtedly worth preserving.
Save your teeth, visit the dentist
Tooth decay, the most prevalent disease in humans, is both predictable and preventable. The earlier it is caught, the more the tooth integrity can be preserved. Since the process starts painlessly, it is imperative to visit the dentist regularly to keep those insidious germs in check.
During your checkup visit, the dental professional will clean your teeth and check for early decay. If you are diligent with your daily preventive measures, the good news for you will be no news – enough to make anyone smile.
Recently, staff at the Wyandotte Animal Shelter in Michigan took in a dog whose condition was described as among the worst they’d ever seen. Pixie, as the dog is named, had fur so overgrown and matted that she could hardly move.
Gazing upon Pixie, one might never guess that an adorable dog existed beneath it.
Wyandotte Animal Shelter
According to staff at the shelter, Pixie was surrendered by her owner, who, regrettably, had neglected to give her the care and attention she needed — leading to her severely unkempt condition. Ultimately, though, his decision to surrender her is what Pixie needed most.
“He had a hard time letting her go but surrendered her to us so we could ensure she would go to someone who could give her the life she deserved,” the shelter wrote.
With that, Pixie’s world was about to change forever — and it would have to start with a much-needed haircut.
Wyandotte Animal Shelter
Staff at the shelter reached out to The Downriver Grooming Co. for what would be an emergency grooming session to help Pixie escape from her matted prison.
“[They got] her in within minutes of our call, and for [three] hours they spent freeing her from that matted fur,” the shelter wrote.
Wyandotte Animal Shelter
After all was said and done, the real Pixie had emerged.
She was totally unrecognizable from her former self.
Wyandotte Animal Shelter
“This little girl was only 5.5 pounds, but she seemed twice her size due to the matted fur,” the shelter wrote, adding that she was in remarkably good health, despite her ordeal beneath that overgrown coat.
Pixie’s world had changed for the better — but it wouldn’t be long until it improved even more.
Wyandotte Animal Shelter
Within days of Pixie’s transformation, thanks to the kindness of those who’d helped her, the little dog got the second chance she so desperately needed.
“Pixie was adopted,” a spokesperson for the Wyandotte Animal Shelter told The Dodo. “Her new family reports that she is doing very well in her new home.”
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We all need second chances from time to time, humans and dogs.
Learning from Dogs 