4 Billion years ago, the Earth may have been Purple.

Says Cracked.com:

"Scientists believe that, for some time, purple-colored organisms may have been so abundant on Earth that the whole place looked like Prince's home world.

Come on, you know he doesn't come from here."

Now it all makes sense.

http://www.cracked.com/article_22604_dog-sized-scorpions-6-ways-earth-was-sci-fi-nightmare.html

[Edited 7/15/15 15:42pm]