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Predators learn to identify prey from other species

Wolves purportedly raised Romulus and Remus, who went on to rule Rome. Is there good scientific evidence for learning across species? Researchers at the Smithsonian Tropical Research Institute (STRI) in Panama wanted to know ...

Vampire bat's blood-only diet 'a big evolutionary win'

At first glance, the cost-benefit ratio of a blood-only diet suggests that vampire bats—the only mammals to feed exclusively on the viscous, ruby-red elixir—flew down an evolutionary blind alley.

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