Sometime in the past 1.1 million years, the thickest part of the Greenland Ice Sheet melted completely, scientists said in a study released today that analyzed fossilized bits of moss, wood shards, insect and fungi fragments, as well as the seed of an Arctic poppy. The samples, gathered decades ago from beneath 2 miles of … Continue reading New Study Reveals Signs of an Ancient Tundra Ecosystem Beneath Greenland’s Thickest Ice