Memorial tanks at the Ukrainian Motherland Monument in Kyiv.
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Who are the Ukrainians and when were they part of the same empire as Russia? A scholar answers basic questions on war in Ukraine.
Listening to music can be a joyful experience.
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As long as you don’t tune out the world and protect your hearing, it’s hard to overdo it.
A fragment of mosaic showing February from the Sousse mosaic calendar.
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The answer comes from how the Romans measured the year.
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Scientists need to be good at asking questions, investigating the world to find answers, and keeping in mind that no matter how much they know, there’s always more to learn.
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DNA contains all the instructions needed to make your body work.
Cartilage makes this scalloped hammerhead shark’s body flexible.
NOAA NMFS
Hard and strong, or bendy and flexible? A cartilaginous skeleton provides advantages in the ocean, but wouldn’t stand up to life on land.
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Humans might one day be able to live somewhere else in the Universe.
No matter its cause, diarrhea is uncomfortable.
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Poop comes in many shapes, sizes and textures. The kind that’s too runny might be the result of wayward germs, Crohn’s disease or lactose intolerance.
Step away from the cotton swabs!
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That brownish/yellowish gunk that comes out on your finger if you scratch deep inside your ear? It actually serves an important purpose in your body.
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You can imagine a white hole as being a black hole in reverse — but is such a thing really possible?
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Though you might not think so to look at them, plants have a busy day.
The body starts plugging up wounds as quickly as it can to prevent blood loss and infection.
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Blood plays a vital role in keeping us alive, from delivering oxygen to the body’s organs to fighting off infections.
The anopheles gambiae mosquito transmits malaria to humans.
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What we call mosquitoes are actually 3500 different types of insects, and they all behave differently.
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Time ends when the universe does.
Specialized anatomy means flightless penguins are master swimmers.
Christopher Michel
How did penguins end up with so few bones – and become lightning-fast swimmers?
Allium schoenoprasum , better known as chives.
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Plants need light to feed themselves, so they grow in ways that help them collect as much of it as they can. Sometimes that’s straight up, but not always.
Most candy is basically just a heap of sugar.
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A healthy diet can include some candy. But if you eat too much, it can interfere with your appetite for the stuff your body actually needs.
The Earth spins as it orbits the Sun. Elements of this image furnished by Nasa.
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Only a planet crashing into it might stop the Earth’s spin.
Humans have big brains.
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Having intelligence helps humans survive.
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In some ways, a space rocket and a passenger aircraft fly much the same. But there is one big reason we can’t just take an aircraft into space.