Was Greenland ever green

Answer 1

Yes, but a very long time ago. Scientists who probed two kilometers (1.2 miles) through a Greenland glacier to recover the oldest plant DNA on record said the planet was far warmer hundreds of thousands of years ago than is generally believed. DNA of trees, plants and insects including butterflies and Spiders from beneath the southern Greenland glacier was estimated to date to 450,000 to 900,000 years ago, according to the remnants retrieved from this long-vanished boreal forest. That view contrasts sharply with the prevailing one that a lush forest of this kind could only have existed in Greenland as recently as 2.4 million years ago. The existence of those DNA samples suggests the temperature probably reached 10 degrees C (50 degrees Fahrenheit) in the summer and -17 °C (1 °F) in the winter. They also indicated that during the last interglacial period, 116,000-130,000 years ago, when temperatures were on average 5 °C (9 °F) higher than now, the glaciers on Greenland did not completely melt away.