A herd of African elephants instinctively formed an "alert circle" to protect the younger elephants at the San Diego Zoo ...

A new position paper by the American Academy of Sleep Medicine highlights the serious health risks associated with sleepiness ...

Mammals and birds yawn, and just like humans, the bigger their brains the longer they yawn. Humans have yawns lasting around six seconds, while mice yawn for one or two seconds. Birds with large ...