Astronomers have found a way to estimate the number of stars in the universe.
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Scientists have a good estimate on the staggering number of stars in the universe.
That pins-and-needles feeling can come from sitting in the same position for a while.
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An exercise physiologist explains how it’s a problem of communication between your brain and your body.
The Earth is round.
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Gravity, mass and centrifugal force all contribute to the final shape of a planet.
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The temperature of the Sun’s surface is about 6,000°C. But higher above the surface, in the atmosphere, it suddenly shoots up to more than a million degrees!
COVID-19 vaccines have been proved safe and effective. But it’s understandable to have questions.
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An infectious disease doctor explains the science behind COVID-19 vaccines at a level that children – and adults – of all ages can understand.
Planting 8 billion trees a year would replace about half of the 15 billion cut down annually.
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Planting a massive number of trees can help slow climate change, but it is only part of the solution.
Tyrannosaurus rex was a relentless predator who lived during the Cretaceous Period more than 65 million years ago.
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Ever since moviegoers saw the first ‘Jurassic Park,’ millions have wondered if scientists could make a dinosaur in the lab.
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Cassette tapes were the first great advancement in portable recording and playback. You can draw a direct line between them and the music apps on every smartphone today.
Beer, wine and hard liquor are causing nearly 100,000 U.S. deaths a year.
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Consuming alcohol makes accidents more likely and it can harm your heart, your liver and even change your brain. But making the sale of beer, wine and hard liquor illegal flopped.
The planet and the way we live on it are constantly changing.
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The Earth is constantly changing in natural ways, but most of those changes are very slow. Humans are speeding up other changes with global warming.
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They can’t fly through the air but they can fly underwater.
Gravity feels like it’s pulling everything toward Earth, but why?
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Gravity is something every person on Earth intuitively understands: It is what keeps you on the ground. But how come gravity pulls down, rather than pushes up? Einstein came up with the answer.
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They seem like a real thing but scientists have done experiments and found they’re actually a myth.
Artist illustration of an exoplanet.
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Billions of galaxies are in the universe, with billions of stars in every galaxy. Could billions of planets be out there too?
Whether big or small, if you see something that people need, you can start a company.
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There are five basic things to address while starting your own company: Need, idea, product, setup and market.
Sneezing with your eyes closed is a reflex you can consciously override.
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People sneeze for many reasons and in many ways. One of them is to protect your airways from irritants and infectious disease.
It can stretch your mind to ponder what’s really out there.
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Astronomers know a lot about what’s in outer space – and think it’s possible it never ends.
A bush viper slithering out of its skin.
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When the snake is ready to shed its skin, it rubs its body along rocks, plants and other rough things to peel the old layer of scales — often in a single, snaky piece.
A behavior from kittenhood persists in many adult cats.
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According to a veterinarian, the behavior some people call ‘kneading the dough’ or ‘making biscuits’ is a clue your cat feels comfortable around you.
Poisonous or edible?
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Poison can be a deadly defense that helps a mushroom make sure its spores are spread to new places to grow into baby mushrooms.