CNN —A core of ice age sediment from northern Greenland has yielded the world’s oldest sequences of DNA. They then compared the DNA fragments with existing libraries of DNA collected from both extinct and living animals, plants and microorganisms. It was super exciting when we recovered the DNA (to see) that very, very different ecosystem. They found no DNA from carnivores but believe predators — such as bears, wolves or even saber-toothed tigers — must have been present in the ecosystem. Further study of environmental DNA from this time period could help scientists understand how various organisms might adapt to climate change.

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