From Discoveries Planet Earth Series.

This puts things into perspective how small and insignificant we are in the grand scheme of things.

Theme from today's Live Earth celebration.

Name: Mercury Symbol: Hg Atomic Number: 80 Atomic Mass: 200.59 amu Melting Point: -38.87 °C (234.28 K, -37.966 °F) Boiling Point: 356.58 °C (629.73 K, 673.844 °F) Number of Protons/Electrons: 80 Number of Neutrons: 121 Classification: Transition Metal Crystal Structure: Rhombohedral ...

A tour of the Solar System! Via School House Rock.

Atmosphere, Conditions, and discovering the history and general info on the red planet