About 18,545 years ago, give or take a few decades, a woolly mammoth died. Succumbing to causes unknown, the creature was buried in Siberian snow. Many other mammoths must have met similar fates but this one, which we now know as M4, is special. Almost 20 millennia later, its beautifully preserved remains were unearthed by scientists who have revealed both its body and its genetic code. For the first time, the genome of an extinct species has been sequenced almost to completion.
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