First, no one is sure why we, or any other animal, dream. During the past century, however, scientists have made significant progress in understanding the factors that influence sleep and dreaming.

Wildlife officials are warning the public of a toxic algae bloom affecting marine mammals along Los Angeles County beaches. On Monday evening, the city of Hermosa Beach posted an “Urgent Marine ...

From its long, flexible trunk to its loud trumpeting sounds, there’s a lot to admire about an elephant. But how much do you know about these massive creatures? Where do they live? How big can they get ...