Life's Little Mysteries: Science questions, answered

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.

When did humans first roast food over a fire? Archaeology and biology can shed light on this mystery.

When it comes to love, the adage is that opposites attract. But does that really hold?

What is the solar system's coldest spot and how does the coldest place on Earth compare?

Squeaking metal can be grating on the nerves, but it serves an important purpose.

Humans are not the only organisms that have periods — some animals do too, but scientists still aren't sure why.

We know that people in colder environments eat more calories. But why does our hunger abate in the heat?