Life's Little Mysteries: Science questions, answered

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?

Animals have been reproducing sexually for hundreds of millions of years, but not always like we do it.

If we can see at most 3% of the universe, how can we estimate the total number of galaxies in it?

While it may initially appear that strawberries are fruits covered in seeds, this is not actually the case.