ScienceDaily Posted June 4, 2012 Share Posted June 4, 2012 Giant insects ruled the prehistoric skies during periods when Earth's atmosphere was rich in oxygen. Then came the birds. After the evolution of birds about 150 million years ago, insects got smaller despite rising oxygen levels, according to a new study. Read the full article on ScienceDaily Link to comment Share on other sites More sharing options...
PhysOrg Posted June 4, 2012 Author Share Posted June 4, 2012 Giant insects ruled the prehistoric skies during periods when Earth's atmosphere was rich in oxygen. Then came the birds. After the evolution of birds about 150 million years ago, insects got smaller despite rising oxygen levels, according to a new study by scientists at the University of California, Santa Cruz. Read the full article on PhysOrg Link to comment Share on other sites More sharing options...
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