Swings In Oxygen Levels May Have Stalled Evolution Of Life

Pincho Paxton Administrator Posts: 11,875 Member is Online	Swings In Oxygen Levels May Have Stalled Evolution Of Life Jul 18, 2014 14:49:10 GMT Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Pincho Paxton on Jul 18, 2014 14:49:10 GMT Link... Swings In Oxygen Levels May Have Stalled Evolution Of Life On Early Earth Pincho says... I think that evolution has stages of fast, and slow changes.