What can ancient DNA can tell us about the effects of climate change? Researchers analyzing ice cores drilled deep from beneath Greenland have amplified samples of DNA trapped within the ice and found that Greenland may have once been quite green. The DNA samples, thought to be the oldest ever recovered, indicate that some 450,000 to 900,000 years ago, boreal forests of spruce, pine, alder and some members of the yew family flourished in Greenland. The researchers also found samples of DNA from butterflies and spiders in their sample, but no genetic material from larger creatures. We'll talk about the work and what it can tell us about the past, and, possibly, about the future.
Produced by Annette Heist, Senior Producer