The old Maxis DOS game SimEarth was based on Gaia. It was amazing by how
much you could turn up the wick and still develop nanotech cities
without dropping any black slabs on stone age cultures. Without
cheating, too (:

I always found that a warmer, wetter planet with a lot of landmass
worked better than a cold one especially as they produced a lot more
fossil and nuclear fuel(!!) to get the player through the industrial,
nuclear and information ages.

In Simearth mammals didn't always reach the goal of making fire first
you could just as easily end up with birds, insects, seals or fish (not
Michael) in charge!

Les

Gavin Staples wrote:
During the 1970's, a new theory was announced that stunned the scientific
community. James Lovelock, a British physicist, and an American

--
Les Crossan,
Wallsend, Tyne & Wear
54.95N 1.5W
Home of the Wallsend StormCam and the Backup USW FAQ -
www.uksevereweather.org.uk