Noah's flood is a story much older than the Bible, and researchers are still learning about its roots.
An Alaskan wildlife guide captured two massive male grizzly bears in a brawl for "mating season dominance rights."
The discovery of 62 'irregular' moons orbiting Saturn brings the planet’s total to 145 — and hints at a chaotic past.
The linkage of the Americas had outsize impacts globally, and its controversial timing has similarly large implications for science.