Two oxygenation events in ancient oceans sparked spread of complex life

The rise of oxygen and the oxidation of deep oceans between 635 and 551 million years ago may have had an impact on the increase and spread of the earliest complex life, including animals, according to a study reported in the Proceedings of the National Academy of Sciences online Early Edition during the week of February 25 – 29.

If you want to include this story in your blog, copy and paste this formatted text:

<p><a href="http://www.physorg.com/news123180801.html">Two oxygenation events in ancient oceans sparked spread of complex life</a></p> <p>The rise of oxygen and the oxidation of deep oceans between 635 and 551 million years ago may have had an impact on the increase and spread of the earliest complex life, including animals, according to a study reported in the <i>Proceedings of the National Academy of Sciences</i> online Early Edition during the week of February 25 – 29.</p>