ScienceDaily: Ancient soil-inhabiting creatures decreased in body size by nearly half in response to a period of boosted carbon dioxide levels and higher temperatures, scientists have discovered. The researchers’ findings are published in the October 5, 2009, early online edition of the journal Proceedings of the National Academy of Sciences (PNAS). Jon Smith, a scientist at the Kansas Geological Survey, and Stephen Hasiotis, a geologist at the University of Kansas, have demonstrated that …