3 junio 2015
About 34 million years ago, global temperatures took a dive, causing a sudden wave of extinctions among European mammals. In North America, however, life went on largely unscathed. A new study explains why: the rise of the Rocky Mountains had forced North American mammals to adapt to a colder, drier world.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/lW5WCJfbjjk/150603083334.htm
