New research shows animals lose helpful bacteria when connected habitats are broken. This weakens their defense against ...

Which animal kills the most humans per year? If you guessed sharks, you'd be wrong ...

We round up nature's most brutal bawlers, from vicious lions and testosterone-filled elephants to sparring ants.

The investigative minds at How to Survive analyze the security lapses and behavioral triggers that led to fatal encounters with tigers and gorillas in controlled environments. Teens arrested after ...