Post #2by Tanketai » 16.11.2005, 21:18
I've also read somewhere that Earth is a little bit past the snow line, and it's the greenhouse effect that keeps it as warm as it is. If Earth was further away from the sun, the greenhouse wouldn't be enough and we would fall back to Snowball Earth.
"There's nothing beyond the sky. The sky just is, it goes on and on, and we play all of our games beneath it."