Oldest DNA sheds light on a 2 million-year-old ecosystem that has no modern parallel
By Katie Hunt, CNN A core of ice age sediment from northern Greenland has yielded the world’s oldest sequences of DNA. The 2 million-year-old DNA samples revealed the now largely lifeless polar region was once home to rich plant and animal life — including elephant-like mammals known as mastodons, reindeer, hares, lemmings, geese, birch trees
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