Will Wright was recently interviewed by Popular Science. In the interview we hear lots of info about Spore and the science behind it. Some interesting little facts that were shared in the interview include:
"In most of those cases you get ratcheted down a level, you don't have to start over from scratch. Like in the creature game, if you die you fall back to last generation, and you might keep dying and dying and dying but eventually you survive that generation then you're ratcheted up, and if you die you fall back to that one. So for the most part you're sort of ratcheting in your progress. But until you get the highest brain level you're not going to enter Tribal, or in Tribal phase until you get 20 members of your tribe you're not going to enter Civilization."You can read the whole story
here.