Nicholas Posted April 17, 2009 Share Posted April 17, 2009 ScienceDaily (Apr. 17, 2009) — During the last 540 million years, the earth's oxygen levels have fluctuated wildly. Knowing that the dinosaurs appeared around the time when oxygen levels were at their lowest at 12%, Tomasz Owerkowicz, Ruth Elsey and James Hicks wondered how these monsters coped at such low oxygen levels. But without a ready supply of dinosaurs to test their ideas on, Owerkowicz and Hicks turned to a modern relative: the alligator. Find the article HERE! Link to comment Share on other sites More sharing options...
mommabetts Posted April 18, 2009 Share Posted April 18, 2009 Very interesting, thanks for posting. Link to comment Share on other sites More sharing options...
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