Geoscience:Earth: Prime Location for Life
When the solar system is young， it consists of nine remote planets， circling the sun in the cold， vacuum space. The outer planets remain bags of gas， hardly the conditions for life to take root. While those close to the sun developed solid surfaces. So which of the inner planets was not too cold， not too hot， and like babybare， just warm enough for life? These are the three candidates: Venus， Earth and Mars. Only plannet earth is just the right distance from the sun， the only warm island in the solar system that could provide life with conditions to thrive.
- Added：2006
- Country：America
- Duration：5
- Time of update：2011/8/17 11:20:10