Life's Little Mysteries: Science questions, answered

Measuring the pace of evolution is tricky, but some species can evolve as quickly as a few generations.

Antarctica is covered by a miles-thick ice sheet, but was that always the case? And when was the coldest continent ice-free?

The special chemistry of this shiny iron alloy creates a protective layer on its surface that prevents it from rusting.

Drinking can change the brain in a way that makes people more likely to speak their mind, but the effects aren't always straightforward.

Heat triggers a series of complex chemical reactions that change the color, flavor and texture of meat.

From the moment of the Big Bang, everything in the universe has kept moving, but why is that?

Height loss could be an early sign of a more serious health condition.

There are many reasons an ancient statue might accidentally lose its head — and some for its head to be severed on purpose.

Meowing, sticking their paw under the door or pawing at the door are just some of the strange things cats do around closed doors. But why?

Using fossil evidence and genetic dating, geneticists and paleontologists have backed strikingly different candidates for the world's first animal.