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Rats feel regret, experiment finds: rodents may lament missed opportunities for food.
With only an hour to eat, a diner hurries into his favorite restaurant. Deterred by a modest wait, he leaves, only to be burned by an even longer wait at the next restaurant. He immediately regrets his decision. This may seem like a typical "woulda, coulda, shoulda" situation--except in this case, the diner is a rat.
In laboratory tests, rodents exhibit regret, scientists report June 8 in Nature Neuroscience. After forgoing a good meal for a bad one, rats pause, glance back at what...
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