life's little mysteries

Spaceborne animals could help humans survive on the moon or Mars. But which creatures would be the best for astronauts?

To reach absolute zero, all of the particles within an object have to stop moving.

And for medical purposes, how stinky is too stinky?

What you think is cat vomit may actually be something else, like a fur ball or regurgitation.

The moon's halo is always 22 degrees wide in the night sky when it appears. So what causes it?

The Vikings reached as far west as Newfoundland, but did they also venture into Africa, the Middle East and Asia?

The dinosaur Brontosaurus was canceled but then resurrected. What happened?

Evidence suggests that people likely boated across the narrow passage between Russia and Alaska when the crossing was submerged.

There are lots of ways to measure predatory prowess, and the animal kingdom is full of worthy contenders.

After the supercontinent Panagea broke up around 200 million years ago, how long did it take for Australia to emerge as its own continent?