From the well-preserved remains of a woolly mammoth that was buried by Siberian winters about 18,545 years ago, scientists were able to extract viable DNA and sequence the majority of an extinct species' genome for the first time. The mammoth's genome is currently about 70 percent sequenced, and researchers estimate the size of the genome to be 40 percent larger than the human genome—approximately the same size as the modern day elephant, which scientists could theoretically use to birth a cloned anachronistic creature.
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