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 ...

When you admire a towering oak or a vibrant maple in your backyard, you’re only seeing half the picture. Beneath the surface ...

Look, the truth is, everyone has knowledge gaps. Some of them might be super niche. Others might be more general and embarrassing to admit to. But no matter how well-read and educated you are, there ...

Did you know that our planet is rocketing around the sun at 67,000 mph? Or that it once had two moons? Here are some amazing facts about Earth.

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Peter Vickers received funding from The British Academy. Astronomers once believed the Sun revolved around the Earth. In the 19th century, scientists thought the shape of a person’s skull could reveal ...