Wondering about the most dangerous birds on Earth? We've compiled this list of the Top 20 scariest birds — some that have ...

Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.

A rare sample from a woolly rhinoceroses reveals how the population changed in the lead-up to the species’ extinction.

Cheetahs sprint faster than any land animal, yet tire quickly, while ostriches run slower but can endure for miles. Which ...