Molecular clocks push the dawn of animal life back to a frozen world 800 million years ago.

Season 4's lead director shares anecdotes and insights about directing the goats, ferrets and dogs of the beloved series seen ...

This blog post addresses behavior across all animal species. It considers what we can learn about behavior when we do not limit our study to just humans. Studying nonhuman animal behaviors is ...

As far as we know, all animals seem to rest. But sleep behaviors and the number of daily hours varies greatly across the animal kingdom. What we do know is that essentially all animals rest — though ...