Behold, the giants! The Hubble Space Telescope has completed a decade of observing Jupiter, Saturn, Uranus and Neptune.

Research on ancient footprints in Kenya demonstrates coexistence of Homo erectus and Paranthropus boisei 1.5 million years ...

A female pygmy hippopotamus delivered a healthy calf at the Metro Richmond Zoo earlier this month, officials said — the third baby hippo born at the zoo within the past five years.

Situs inversus is a rare genetic condition that causes the organs in the chest and abdomen to be located on the opposite side ...