Two new studies of gases trapped in Antarctic ice cores have extended the record of Earth's past climate almost 50 percent further, adding another 210,000 years of definitive data about the makeup of the Earth's atmosphere and providing more evidence of current atmospheric change. The research is being published in the journal Science by participants in the European Project for Ice Coring in Antarctica. It's "an amazing accomplishment we would not have thought possible" as recently as 10 years ago, said Ed Brook, a professor of geosciences at Oregon State University, who analyzed the studies in the same issue of...