Antarctic ice sheet is result of CO2 decrease, not continental breakup

http://www.sciencedaily.com/releases/2014/07/140730141020.htm

Date: July 30, 2014
Source: University of New Hampshire

Summary:
Climate modelers have shown that the most likely explanation for the initiation of Antarctic glaciation during a major climate shift 34 million years ago was decreased carbon dioxide levels. The finding counters a 40-year-old theory suggesting massive rearrangements of Earth's continents caused global cooling and the abrupt formation of the Antarctic ice sheet. It will provide scientists insight into the climate change implications of current rising global CO2 levels.