Drop in CO2 levels triggered formation of Antarctic ice sheet

A new study suggests that a drop in carbon dioxide (CO2) levels seems to have triggered Antarctic ice sheet formation.Roughly a 40 percent decrease in CO2 occurred prior to and during the rapid formation of a mile-thick ice sheet over the Antarctic approximately 34 million years ago.The long-held, prevailing theory known as "Southern Ocean gateway opening" is not the best explanation for the climate shift that occurred during the Eocene-Oligocene transition when the Earth's polar regions were … Read more at candidshare.com