"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Stay sharp and learn something new every day or stock up on knowledge for the next 105 days with these ...

Science is amazing, fascinating, and, if we’re being honest, sometimes absolutely terrifying. While we usually hear about cool breakthroughs and feel-good discoveries, there’s a darker side of science ...

Talk about a bizarre feature of the human body: If you happened to swallow a razor blade, your stomach acid would dissolve it. Acids are ranked on a scale from zero to 14—the lower the pH level, the ...

The natural world rarely behaves the way we expect. Physics bends intuition. Biology ignores neat categories. Space refuses to be reasonable. Some facts sound like they were invented for a science ...

How many legs do insects have? Insects have six legs. These legs are attached to the central part of an insect's body, the thorax, and they are controlled by muscles in the thorax. Insects have hearts ...

Where they live: Plants are found on every continent, even Antarctica, and every ocean. What they eat: Plants use sunlight for photosynthesis, which produces sugars that fuel them. How big they are: ...

Have you ever had a childhood memory suddenly go from "cool story" to "wait, that’s actually terrifying"? That’s the vibe ...