Earth is a life-containing planet in the Milky Way Galaxy. Its average surface temperature is 287°K. It revolves around Sol , and up until recently has been the only known planet in this system to support life until salt water was discovered on Mars in 2015. The most intelligent species of Earth is the Homo Sapien, and other intelligent species include Horses, Dogs, Apes and Cats. Humans of Earth are entering the Nano Age, discovering technologies such is interplanetary manned rockets and virtual reality. Unless this site's information is beamed into space in the future, it is likely that only humans will ever read this article. Main languages include English, French, Spanish and Chinese while major religions include Catholicism, Judaism and Islam. Finally, Earth's visible surface colors are Green, Blue, White and Brown.