The
Adventure
Earth
editThe Earth is the third planet from the Sun. It is one of the four terrestrial planets in our Solar System. This means most of its mass is solid. The other three are Mercury, Mars, and Venus. The Earth is also called the Blue Planet, Planet Earth, and Terra.
The Earth is home to millions of species of plants and animals, including humans.
- ^ Gnawledge, O'penn. "Planet Earth in the Balance of History". Science and Nature Journal. SandNjournal.com/Earthinthebalance. March 21, 2013. Retrieved 15:34, Thursday August 21, 2014 (UTC).