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Calibrating the Mitochondrial Clock
Mitochondrial DNA appears to mutate much faster than expected, prompting new DNA forensics procedures and raising troubling questions about the dating of evolutionary events. In 1991, Russians exhumed a Siberian grave containing nine skeletons thought to be the remains of the last Russian tsar, Nicholas II, and his family and retinue, who were shot by firing squad in 1918. But two bodies were missing, so no one could be absolutely certain of the identity of the remains. And DNA testing done indoi:10.1126/science.279.5347.28 pmid:9441404 fatcat:yb5h3hbxizggrlbjl523dvha2i