More than 600,000 soldiers died during the American Civil War.
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There was one central reason the Civil War happened.
The best place to study is in a space with no distractions and plenty of light.
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A researcher who studies ways to help students become better readers and writers describes how to create a homework habit using a loop: cue, routine, reward.
The Jharia coal field in India has been on fire underground since 1916.
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Some rocks will burn, and others will melt, depending on how they were formed and what minerals they contain.
Reading becomes faster when you don’t have to say each word out loud.
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Called your ‘inner voice,’ it develops along with your reading skills.
An aerial view of the Mauna Loa volcano, which erupted on the island of Hawaii in December 2022.
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As they shape the Earth, volcanoes inspire and terrify humans.
The higher your vantage point, the more likely you’ll see more of the rainbow’s circle.
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Each rainbow is personal – the rainbow you see isn’t exactly the same rainbow the next person sees. It’s all in the eye of the beholder.
‘Earthrise,’ a photo of the Earth taken by Apollo 8 astronaut Bill Anders, Dec. 4, 1968.
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The Earth isn’t permanent, but it was here for four billion years before humans arrived and should be here for several billion more.
Eventually weather, pests and disease will take their toll, but the story doesn’t end there.
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Even in death, a tree helps others live.
One distinction between a snail and a slug: The snail has a shell.
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These members of the mollusk family may be slow, small and slimy, but they are an indispensable part of the ecosystem.
Even playing with a fake gun comes with risks.
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Even fake guns can be dangerous if they are mistaken for real ones by the police or other armed adults.
Time gets a little strange as you approach the speed of light.
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Your experience of time is relative because it depends on motion – more specifically, your speed and acceleration.
The internet is used for a lot more than just surfing the web.
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Almost everybody uses the internet just about every day. But do you really know what the internet is?
A trash compactor rolls over an active dump site at Pioneer Crossing Landfill in Birdsboro, Pa.
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Humans generate a lot of trash, but there are cheaper and safer ways to handle it than loading it on rockets.
This is the famous – and fake – photograph of the Loch Ness monster, taken near Inverness, Scotland, on April 19, 1934. The photograph was later revealed to be a hoax.
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The idea of a creature like the Loch Ness monster fascinates people. But does the scientific evidence say it’s a prehistoric beast or total fake?
Maybe the first life on Earth was part of an ‘RNA world.’
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Fossil evidence of how the earliest life on Earth came to be is hard to come by. But scientists have come up with a few theories based on the microbes, viruses and prions existing today.
There are many pieces of evidence to help explain why the Earth spins, and some major mysteries.
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An astronomer takes us on a tour of the universe to learn about the birth of stars and planets and how they get their spin.
It wasn’t flying that gave birds the advantage.
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Birds and dinosaurs lived together for millions of years, but only toothless birds survived the asteroid impact that upended life on Earth.
Cells at Alcatraz, a famous former prison on an island off the coast of California.
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Prisons and jails have a long history, but they weren’t always used for the same kinds of punishment.
The slice you see cut out of the Earth reveals its core, depicted here in bright yellow.
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Starting at the surface, you would have to dig nearly 2,000 miles before reaching the Earth’s core. No one could survive that trip – and the 10,000-degree F heat once there would vaporize you anyway.
Your zodiac sign – like Sagittarius, the archer – might be in the stars, but your future isn’t.
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Astrology and astronomy were once practiced side by side by scientists like Galileo and Kepler. And they’re more similar than you might think.