New species of bat, Pipistrellus etula, on Bioko Island, bringing the total number of known species worldwide to 1,500.

The annual Great Migration of millions of wildebeest and zebras across the plains of the Serengeti is one of the world’s ...

Air pollution remains a major cause of death in the United States, one usually associated with tailpipe exhaust and factory and power plant smokestacks. Now new research shows that 16,000 U.S. deaths ...

Discover the list of animals that sleep the most in the world. Learn which species is the sleepiest animal and which animal ...