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PBS
Why Wasn't There A Second Age of Reptiles?
An asteroid impact triggered the K-Pg mass extinction, wiping out the non-avian dinosaurs, ending the Age of Reptiles, and ushering in the Age of Mammals. But why was it the mammals who triumphed?
PBS
The Graveyard at the Center of the Earth
Scientists have been trying to solve the mystery of why plate tectonics works the way it does for over a hundred years. And they might have just uncovered a key to cracking it.
PBS
Could This Sperm Whale Eat The Meg?
Unlike in fiction, giant whales do not emerge fully-formed from the ocean deep. So, where did Livyatan melvillei come from? How did such a large predator live? And what caused the titan to die out? The answer may lie in an appetite so...
PBS
Are All Oceans Basically Reincarnated?
This is the hundred-year tale of how an unlikely bunch of bottom-dwelling marine critters helped reveal that ocean basins are basically reincarnated every few hundred million years.
PBS
Darwin's Unexpected Final Obsession
After having solved the small matter of evolution by natural selection - becoming one of the most famous scientists in the world in the process - Charles Darwin turned his focus to a different personal obsession…
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What Could We See with a Planet-Sized Telescope?
The James Webb Telescope just took a photo of a newly discovered exoplanet. Exciting stuff but the raw image just looks like a small, faint dot—not a fully detailed world. The question is, just how big would a telescope need to be to...
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Why OOH Sounds Different Than AHH
Human language is an incredible thing: a combination of mouth sounds that we combine into words, sentences, poems, and constitutions. They carry meaning, emotion, and power. But underneath it all, language is really just physics. In this...
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When the CIA Spied on Planet Earth
In 1995, a few years after the collapse of the Soviet Union, a top-secret, first-of-its-kind US spy satellite program was declassified, leading to the unexpected story of how former enemies would become scientific allies, and technology...
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The Great Oxygenation
Life’s been around on Earth for at least 3.7 billion years. But for most of that time, it was incredibly boring — just simple little cells squirming around in water. It only got interesting in the last few hundred million years. And that...
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How Scorpions Became Earth’s Ultimate Survivors
Scorpions are a frightening and deadly group of animals. But their venom is one of nature's most unique chemical cocktails. Here’s how scientists are using it for inspiration to design new medicines and pain killers.
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Why Some of the Rainbow is Missing
Over 200 years ago, scientists were looking at sunlight through a prism when they noticed that part of the rainbow was missing. There were dark lines where there should have been colors. Since then, scientists have unlocked the secrets...
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The Biggest Myth About Innovation
The idea of the lone genius creating everything isn’t just misleading. It’s harmful and wrong. Innovation thrives when people work together, and rather than nice linear paths, new ideas come from chance events and unexpected connections....
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What is the Most Average Thing?
We may not know it, but averages affect our lives every day. Designers and manufacturers use averages to make our houses, cars, shoes and airline seats safer and more comfortable(ish). But calculating averages is way more complicated...
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How Did X Become the Unknown (and so much else)?
X is everywhere and it’s probably thanks to math. But why is x the symbol for the unknown?
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Can a Billion Oysters Save New York City?
When people picture New York City they see skyscrapers, subways, and a concrete jungle. But the Big Apple is really a seaside city built on an archipelago. In the wake of a century of industrial pollution and climate change-fueled...
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How Scientists Made the Hottest Thing Ever
At CERN, physicists are searching for answers to some of the biggest questions ever — like how the universe started and where everything comes from. To get one step closer to an answer, CERN scientists recreated the first moment after...
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I Don’t Know How to Feel About 2023
2023 was a wild year with everything from scorching temperatures to massive wildfires. Even with more renewable energy than ever, 2023’s climate data still seems really bad. So how should we think about climate change today? And what can...
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Maybe We've Already Made First Contact…
There are hundreds of billions of planets in our galaxy. Scientists now think hundreds of millions of them have conditions where life could arise. What do scientists think are the best ways of reaching out to them? And why do some...
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Why NASA Punched an Asteroid
Where did life come from? It’s one of the biggest questions humans have ever asked — and the answer might be locked in ancient space rocks that were around before life began. To find out, NASA pulled off one of its most ambitious...
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Space is Full of Junk. Here’s How to Clean It Up…
We know pollution is a problem on earth, but we’re filling space with our junk too. And if we don’t figure out a way to clean up space junk, we could end our interstellar dreams before they even get started. Today, we’re visiting some...
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Why the 2024 Solar Eclipse is Such a Big Deal
On April 8, 2024, the Moon’s shadow will fall on Earth, creating a total solar eclipse across North America, and if you have the chance to see it, you don’t want to miss it. It’s an amazing coincidence that total eclipses happen at all —...
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Computers Can Predict When You're Going to Die… Here's How
Predictive analytics uses math and historical data to make predictions about the future. It’s used in commerce, sports, politics, social media and tons of other places. And as it turns out, people have been using math to predict people’s...
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The Surprising Power of Sex in Evolution
We all know Charles Darwin's theory of evolution, right? Natural selection? But what about his lesser-know theory of evolution: sexual selection. Let’s talk about how animals like peacocks, whose eye-catching physical traits make them...
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The Real (Weird) Way We See Numbers
Would it surprise you to learn that fish and birds count in pretty much the same way that we do? And that infants can do math? Our animal brains deal with quantities in very specific ways, from quick counts of a few dots to how we...