The multiverse is huge in pop culture right now — but what is it, and does it really exist?

Why human brains were bigger 3,000 years ago. Our modern civilisation may be the most advanced to ever exist on Earth, but around 100 generations ago, our ancestors had brains that were larger than our own.

Do trees exist (scientifically speaking)?

Jupiter’s Moon Europa May Have Shallow Water And An Earth-Like Ocean Where Life Could Exist, Say Scientists