Ashley Hamer

You've probably had a dentist remind you to floss — but when's the best time to do so?

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

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

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

The human body has a number of mechanisms that prevent you from holding your breath until you suffocate.

Earth is round, but are there any planets in the universe that aren't?

It's commonly thought that sperm "race" to the egg, with the winner fertilizing it. But is this really the case?

Why do kangaroos have 3 vaginas?

Will we ever have an underwater tunnel between New York and London?

Why can pumpkins grow so large, but blueberries can't?