Geographic tongue (GT) is a medical condition in which the upper layer of the tongue, which consists of tiny hair-like protrusions (called papillae), is damaged due to an expanding inflammation.

While "Back to the Future" may have been the trigger for many people's dreams of owning a flying car, the idea has actually been floating around the minds of man since not long after cars became widely available at the beginning of the 20th century.

Scientists have resolved pieces of a nearly 200-year-old evolutionary puzzle surrounding the group of mammals that Charles Darwin called the "strangest animals ever discovered."

Remove this rusted metal cap and the world's deepest hole tunnels miles into the Earth.