Environmental News Network: The Earth goes through natural cooling and warming trends, not to be confused with man's impact on climate. Ice Ages have occurred and waned. The pace of warming at the end of an ice age has been the subject of debate. It turns out that in Antarctica the pace of warming at the end of the last ice age was far from uniform. West Antarctica began emerging from the last ice age about 22,000 years ago well before other regions of Antarctica and the rest of the world, according to a team of scientists...