The PC version of SimEarth took approximately 23,500 hours to program.
The Amiga version of the game was released in the Maxis Classic reissue box, even though it was a full price title, due to being released nearly 2 years after the PC version. Sim Ant was the same.
There is actually a theory that believes that the Earth is a living organism. The theory is the "Gaia" theory. [SimEarth is based on this theory. -Editor]
The European version of this game is multilingual: Language must be chosen when installing. Choices: English, French, German.
You can create a race of intelligent machines by "nuking" appropriately.