If you're out and about on a sweltering day, it probably won't be long before you start to feel tired and sluggish. But why does being out in the heat bring on feelings of drowsiness?
Life's Little Mysteries answers fascinating questions about the world around you and the stuff in it, from things in the news and on your mind to crazy questions you didn't even know you had.
Why is it that when you're tremendously hungry, you're able to forget about it if you're in the middle of an intriguing activity, such as reading a good book?
Researchers who study sleep now have a few theories about why we spend one-third of our lives in dreamland.
Before you take a dip, know this: There is definitely pee in the swimming pool. But, it's probably not that much.
Energy from the sun's rays can cause skin damage and cancers. Sunscreens can absorb or reflect the dangerous UV light. Here's everything you need to know to read the labels in the sunscreen aisle.
They can reach 19 feet tall, meaning giraffes tower over the savannah they live in. So do they get struck by lightning more than other, shorter animals?
For decades, while astronomers have detected black holes equal in mass either to a few suns or to millions of suns, the missing-link black holes in between have eluded discovery.
If you cut the leg off a salamander, it grows back. Humans, however, can't manage the trick. The reasons are far from simple, and to some extent are still a bit of a mystery.
The graceful whale swims by undulating its wide tail up and down, while the shark swims by moving its tail side to side. Why the difference?
A mesmerizing material called "kinetic sand," which can be molded like clay but also somehow feels silky, is enjoyable for kids and adults alike.
The search for signs of extraterrestrial life extends from eavesdropping on radio signals, to observing the atmospheres on distant worlds.
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