Trulove, Susan2015-10-292015-10-292008-02-28http://hdl.handle.net/10919/60899The 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 Feb. 25 through 29.text/htmlIn CopyrightResearchPress releaseVirginia Tech. University Relations