On the outside, giant pandas look like herbivores. But on the inside, they’re built like carnivores.
published Thursday in the journal Current Biology. “It looks like no other herbivore that we know of — none whatsoever. But it looks astonishingly similar to a carnivore.”
But sometime between 2.4 million and 2 million years ago, things began to change. The gene for their umami taste receptor became inactive. Their jaw and teeth evolved to help them crush bamboo, and their wrist bone became something of an extra digit — ablack and white bears Raubenheimer and his colleagues wanted to learn more about this extreme herbivore way of life. So they put GPS trackers on two giant pandas and followed their movements throughout the year.
Although the pandas chewed through so much protein, the researchers didn’t assume the animals actually digested it all. So they collected and analyzed the pandas’ manure .
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