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U.K. science star Brian Cox’s new book explores how we might live in a black hole

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Quirks and Quarks16:47UK science star Brian Cox’s new book explores how we might live in a black hole

 

Black hole research in the last few years is revealing a tantalizing new view of the very nature of time and space.

In his new book, physicist and science communicator Brian Cox explores how the new physics might help us reconcile the fundamental clash of principals stemming from our understanding of gravity at a cosmological scale and the physics of the minutia that underlies it, quantum theory.

The professor of particle physics from the University of Manchester and the Royal Society spoke with Bob McDonald about his new book, Black Holes: The Key to Understanding the Universe

Here’s part of their conversation.

You say right in the title of your book that black holes are the key to understanding the universe. How has that become even more true in recent years?

Beginning with Stephen Hawking’s work in the 1970s, it was understood that black holes are not only interesting from an astrophysical perspective, but they actually set up a fundamental clash of principle between the two great pillars of 20th and 21st century physics, which are Einstein’s theory of gravity and quantum theory.

In his new book, physicist Brian Cox explores how black holes are like the Rosetta stones to a deeper understanding of not only our universe, but the very nature of reality itself. (Harper Collins)

Hawking discovered that when you put those two frameworks together, there’s a prediction, which is black holes have a temperature. Now that was a remarkable discovery because temperature was just a thing you could measure on a thermometer, but it was really only fully understood when we knew that everything is made of atoms.

Temperature tells you how fast the component parts of something are jiggling around and moving.

Contrast that with the description of a black hole. A black hole in Einstein’s theory is just a distortion in the fabric of space-time where even light itself cannot escape. All it is geometry. It doesn’t appear to have any moving parts at all, so immediately back in the 1970s, there was a sign that there may be something deeper to black holes.

A more modern version of Hawking’s discovery is that the temperature of a black hole has to do with the information it can store or hide from us.

When you say information, what do you mean? 

Literally bits of information. So Jacob Beckenstein calculated how much information a black hole contains. And he found an astonishing result: the amount of information — in bits literally — that the black hole stores is equal to the surface area of the event horizon of the black hole.

Stephen Hawking is seated in his wheelchair in front of a podium.
Theoretical physicist Stephen Hawking’s 1974 theory about black holes having a temperature kickstarted what has become a quantum revolution in astrophysics. (Matt Dunham/Associated Press)

The event horizon is the point of no return.

Yes, the point of no return. But remember, it’s just space. For very big black holes, like the sort you find at the centres of galaxies, you could fall through it and you wouldn’t notice a thing.

When you say bits of information, I usually think of bits that are used in terms of computer science to describe a zero or a one that encodes information. What are the bits of the event horizon in a black hole? 

Well, yeah, so that’s what you’re supposed to think. What are they? We don’t know. We seem to know how big they are, so how many pixels there are.

But it’s very strange for two reasons. One is that we’re just talking about space for a start, so what do we mean by a pixel of space? And secondly, this idea that somehow the amount of information is proportional to the surface area.

A bluish star glowing with a prism of rainbow-coloured light is seen being pulled inside a dip in the fabric of spacetime caused by the gravitational pull of a black hole in space.
In this artist’s rendering, a star makes its closest approach to the supermassive black hole at the center of the Milky Way. (Nicolle R. Fuller/National Science Foundation/Reuters)

We say that nothing can come out of a black hole and yet, Stephen Hawking is famous for his Hawking radiation, which does come out of a black hole. And if it has temperature, that’s also something coming out of a black hole. Take me through that.

Stephen Hawking uses an analogy in his 1974 paper to describe what’s happening. You can picture the vacuum of space. If you could imagine zooming in and slowing time down with some great microscope, you could picture the vacuum of space as not being empty, as being filled with particles fizzing in and out of existence all the time.

Imagine that a pair of these particles, which would have come into existence and disappeared again, they can be configured such that one’s on the inside of the horizon and one is on the outside of the horizon.

So that means that the one on the inside is not coming out, but the upshot is the one on the outside that would have gone back and re-merged with its partner, essentially giving its energy back to the vacuum, can be made real and can escape into space.

Two photos of a black hole are side by side. The one on the left shows a more white-hot orange ring of a black hole's event horizon. The less blurry image on the right shows the bright ring of the event horizon with sharper edges that appear thinner.
The supermassive black hole in the galaxy M87 was originally photographed by the Event Horizon Telescope collaboration in 2019, left, and was spruced up in a 2023 image generated by the PRIMO algorithm, right. (Medeiros et al. 2023/Reuters)

Not that I want to throw your book into a black hole, but what would happen to it and the information that it contains if I tossed it in?

As viewed from the outside, you can picture the book as being completely incinerated as it approaches the horizon, with all the bits of information being smeared around.

You could almost imagine this kind of hot atmosphere of the black hole, which somehow contains the information and re-radiates it out into the universe again. And that would be essentially what happens when you burn the book.

A point of bright light depicting a star that's being eaten by a black hole with a long red tail of gas arcing out of the black hole that in this image looks like a circular dark cloud.
A glowing stream of material from a star is disrupted as it was being devoured by a supermassive black hole surrounded by a ring of dust and illuminated by high-energy radiation. (Caltech/JPL/NASA)

So no problem, except that according to Einstein’s theory of general relativity, you can also ask the question, what does that look like from the perspective of the book or an astronaut falling in? Einstein’s theory is unequivocal. From the perspective of the book or the astronaut, you can fall across the horizon into the interior of the black hole.

Now you have two descriptions of what happened from different perspectives and both are correct.

You said at the beginning of our conversation that this new idea of reality in a black hole is part black hole geometry and part quantum physics. How do we tie those two together to bring us to a new understanding of reality? 

So we had these disparate ideas, right? The black hole can somehow store information and it’s something to do with the surface area of the black hole. And then we have this idea that there are different pictures of what happened and that they can both be true at the same time.

The modern view is that all these different pictures are trying to tell us something. And what they’re trying to tell us seems to be that space and time are not fundamental properties of the universe, but they emerge from a deeper theory. And that theory seems to be quantum theory which does not have space and time in it.

We see a bright glowing outline of a supermassive black hole's event horizon that takes the shape of the planet Saturn with a bright white hot yellow star passing by leaving a haze of gas in is wake.
In this illustration, a supermassive black hole pulls a stream of gas off a star that passes too close. (Chris Smith/USRA/GESTAR/NASA’s Goddard Space Flight Center)

So, the black holes, as we say in the book, they’re like Rosetta stones in the sense that they’re forcing us to discover that there are different descriptions of our universe. One of them is the description of Einstein and then there’s another description, which just looks like some kind of quantum theory, some kind of building blocks of the universe that are entangled together.

And so quantum mechanics allows for this property where things can be related to each other — connected together, if you like. And out of that emerges this other description that we’re familiar with. So it’s almost like the black hole is a naturally occurring object that forced us to glimpse a deeper description of our reality.

 

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Here’s how Helene and other storms dumped a whopping 40 trillion gallons of rain on the South

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More than 40 trillion gallons of rain drenched the Southeast United States in the last week from Hurricane Helene and a run-of-the-mill rainstorm that sloshed in ahead of it — an unheard of amount of water that has stunned experts.

That’s enough to fill the Dallas Cowboys’ stadium 51,000 times, or Lake Tahoe just once. If it was concentrated just on the state of North Carolina that much water would be 3.5 feet deep (more than 1 meter). It’s enough to fill more than 60 million Olympic-size swimming pools.

“That’s an astronomical amount of precipitation,” said Ed Clark, head of the National Oceanic and Atmospheric Administration’s National Water Center in Tuscaloosa, Alabama. “I have not seen something in my 25 years of working at the weather service that is this geographically large of an extent and the sheer volume of water that fell from the sky.”

The flood damage from the rain is apocalyptic, meteorologists said. More than 100 people are dead, according to officials.

Private meteorologist Ryan Maue, a former NOAA chief scientist, calculated the amount of rain, using precipitation measurements made in 2.5-mile-by-2.5 mile grids as measured by satellites and ground observations. He came up with 40 trillion gallons through Sunday for the eastern United States, with 20 trillion gallons of that hitting just Georgia, Tennessee, the Carolinas and Florida from Hurricane Helene.

Clark did the calculations independently and said the 40 trillion gallon figure (151 trillion liters) is about right and, if anything, conservative. Maue said maybe 1 to 2 trillion more gallons of rain had fallen, much if it in Virginia, since his calculations.

Clark, who spends much of his work on issues of shrinking western water supplies, said to put the amount of rain in perspective, it’s more than twice the combined amount of water stored by two key Colorado River basin reservoirs: Lake Powell and Lake Mead.

Several meteorologists said this was a combination of two, maybe three storm systems. Before Helene struck, rain had fallen heavily for days because a low pressure system had “cut off” from the jet stream — which moves weather systems along west to east — and stalled over the Southeast. That funneled plenty of warm water from the Gulf of Mexico. And a storm that fell just short of named status parked along North Carolina’s Atlantic coast, dumping as much as 20 inches of rain, said North Carolina state climatologist Kathie Dello.

Then add Helene, one of the largest storms in the last couple decades and one that held plenty of rain because it was young and moved fast before it hit the Appalachians, said University of Albany hurricane expert Kristen Corbosiero.

“It was not just a perfect storm, but it was a combination of multiple storms that that led to the enormous amount of rain,” Maue said. “That collected at high elevation, we’re talking 3,000 to 6000 feet. And when you drop trillions of gallons on a mountain, that has to go down.”

The fact that these storms hit the mountains made everything worse, and not just because of runoff. The interaction between the mountains and the storm systems wrings more moisture out of the air, Clark, Maue and Corbosiero said.

North Carolina weather officials said their top measurement total was 31.33 inches in the tiny town of Busick. Mount Mitchell also got more than 2 feet of rainfall.

Before 2017’s Hurricane Harvey, “I said to our colleagues, you know, I never thought in my career that we would measure rainfall in feet,” Clark said. “And after Harvey, Florence, the more isolated events in eastern Kentucky, portions of South Dakota. We’re seeing events year in and year out where we are measuring rainfall in feet.”

Storms are getting wetter as the climate change s, said Corbosiero and Dello. A basic law of physics says the air holds nearly 4% more moisture for every degree Fahrenheit warmer (7% for every degree Celsius) and the world has warmed more than 2 degrees (1.2 degrees Celsius) since pre-industrial times.

Corbosiero said meteorologists are vigorously debating how much of Helene is due to worsening climate change and how much is random.

For Dello, the “fingerprints of climate change” were clear.

“We’ve seen tropical storm impacts in western North Carolina. But these storms are wetter and these storms are warmer. And there would have been a time when a tropical storm would have been heading toward North Carolina and would have caused some rain and some damage, but not apocalyptic destruction. ”

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Follow AP’s climate coverage at https://apnews.com/hub/climate

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Follow Seth Borenstein on Twitter at @borenbears

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Associated Press climate and environmental coverage receives support from several private foundations. See more about AP’s climate initiative here. The AP is solely responsible for all content.

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‘Big Sam’: Paleontologists unearth giant skull of Pachyrhinosaurus in Alberta

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It’s a dinosaur that roamed Alberta’s badlands more than 70 million years ago, sporting a big, bumpy, bony head the size of a baby elephant.

On Wednesday, paleontologists near Grande Prairie pulled its 272-kilogram skull from the ground.

They call it “Big Sam.”

The adult Pachyrhinosaurus is the second plant-eating dinosaur to be unearthed from a dense bonebed belonging to a herd that died together on the edge of a valley that now sits 450 kilometres northwest of Edmonton.

It didn’t die alone.

“We have hundreds of juvenile bones in the bonebed, so we know that there are many babies and some adults among all of the big adults,” Emily Bamforth, a paleontologist with the nearby Philip J. Currie Dinosaur Museum, said in an interview on the way to the dig site.

She described the horned Pachyrhinosaurus as “the smaller, older cousin of the triceratops.”

“This species of dinosaur is endemic to the Grand Prairie area, so it’s found here and nowhere else in the world. They are … kind of about the size of an Indian elephant and a rhino,” she added.

The head alone, she said, is about the size of a baby elephant.

The discovery was a long time coming.

The bonebed was first discovered by a high school teacher out for a walk about 50 years ago. It took the teacher a decade to get anyone from southern Alberta to come to take a look.

“At the time, sort of in the ’70s and ’80s, paleontology in northern Alberta was virtually unknown,” said Bamforth.

When paleontogists eventually got to the site, Bamforth said, they learned “it’s actually one of the densest dinosaur bonebeds in North America.”

“It contains about 100 to 300 bones per square metre,” she said.

Paleontologists have been at the site sporadically ever since, combing through bones belonging to turtles, dinosaurs and lizards. Sixteen years ago, they discovered a large skull of an approximately 30-year-old Pachyrhinosaurus, which is now at the museum.

About a year ago, they found the second adult: Big Sam.

Bamforth said both dinosaurs are believed to have been the elders in the herd.

“Their distinguishing feature is that, instead of having a horn on their nose like a triceratops, they had this big, bony bump called a boss. And they have big, bony bumps over their eyes as well,” she said.

“It makes them look a little strange. It’s the one dinosaur that if you find it, it’s the only possible thing it can be.”

The genders of the two adults are unknown.

Bamforth said the extraction was difficult because Big Sam was intertwined in a cluster of about 300 other bones.

The skull was found upside down, “as if the animal was lying on its back,” but was well preserved, she said.

She said the excavation process involved putting plaster on the skull and wooden planks around if for stability. From there, it was lifted out — very carefully — with a crane, and was to be shipped on a trolley to the museum for study.

“I have extracted skulls in the past. This is probably the biggest one I’ve ever done though,” said Bamforth.

“It’s pretty exciting.”

This report by The Canadian Press was first published Sept. 25, 2024.

The Canadian Press. All rights reserved.

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The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

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TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.

Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.

Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.

The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.

The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.

It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.

Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.

Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.

Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.

Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.

Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.

The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”

The Canadian Press. All rights reserved.

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