This site is not maintained. Click here for the new website of Richard Dawkins.

Comment

← Birds Ended Reign of Giant Insects

ridelo's Avatar Jump to comment 4 by ridelo

30% O2! What caused that amount of oxygen? Too many plants, too little animals? Wildfires should have been really wild in those days.

Sat, 09 Jun 2012 21:02:15 UTC | #946631