When Greenland was green: Ancient soil from beneath a mile of ice offers warnings for the future || by Paul Bierman and Tammy Rittenour :: The Conversation

"About 400,000 years ago, large parts of Greenland were ice-free. Scrubby tundra basked in the Sun’s rays on the island’s northwest highlands. Evidence suggests that a forest of spruce trees, buzzing with insects, covered the southern part of Greenland. Global sea level was much higher then, between 20 and 40 feet above today's levels".... More at The Conversation ➜