Add Yahoo as a preferred source to see more of our stories on Google. When it comes to animals, alligators are likely among the toughest in the world — and they’ve got the reputation to prove it.

We often see documentaries or videos of alligators floating in the water with their eyes and nostrils out, sneakily waiting for prey. Sometimes, these alligators are sleeping or just relaxing and ...

The immune-boosting power of a fever is surprisingly ancient. Cold-blooded creatures like fish typically move to warmer environments to help fight infections. In one fish species, Nile tilapia, that ...