Mercury has the shortest and fastest orbit around the Sun and experiences dramatic temperature changes as it rotates. It is a world of extremes. Explore facts about our solar system's fastest planet.

Almost everything you could want to know about the closest planet to the Sun, Mercury. Real HD photos and videos taken by the MESSENGER probe. We discuss the orbit, climate, geographical features ...

He can no longer eat the fish he catches from the lake near his home in Georgia. Mercury from industry has seeped into its waters. At the bottom of the food chain, bacteria here transform this ...