Lethe
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- Jul 14, 2011
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Take, for example, a shark, a dolphin and a bear. On a cursory examination, the bear seems the odd one out. But if you examine their teeth, their skeletons, their reproductive systems, their biochemistry, their DNA, and dozens of other things that might shed light on who is related to whom and how closely, it is the shark that is left behind.
Or the sugar glider, the flying squirrel, and the human.
On cursory examination the flying squirrel and the sugar glider appear very similar. But the human and the squirrel are actually more similar and there is far less genetic difference between the human and the squirrel than the sugar glider and the squirrel.
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