BEIJING: The discovery of panda fossils in China has helped researchers solve the mystery of how the giant species developed a 'false thumb' and became the only dedicated...
BEIJING: The discovery of panda fossils in China has helped researchers solve the mystery of how the giant species developed a 'false thumb' and became the only dedicated vegetarian in the bear family.Fossils dating back about six million years found in southwest China's Yunnan province included a greatly enlarged wrist bone called a radial sesamoid.
'Researchers had known about the panda's false thumb, which works similar to a human thumb, for about a century. But the lack of fossil evidence had left unanswered questions about how and when the extra digit — not seen in any other bear — evolved.'While the giant panda's false thumb is not the most elegant or dexterous... even a small, protruding lump at the wrist can be a modest help in preventing bamboo from slipping off bent fingers,' Wang wrote.
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