Vampire bats rely on blood-derived amino acids to fuel their activity, scientists have discovered after making the animals work out on tiny treadmills. Most mammals, including humans, rely on ...

"So blood is the only thing they eat. So we didn't have to worry that maybe they'd eaten some fruit earlier in the day, that's not part of their diet. So they would have exclusively eaten blood the ...

You can probably picture a vampire: a pale, sharply fanged, undead sucker of blood, deterred only by sunlight, religious paraphernalia and garlic. They’re gnarly creatures, often favorite subjects for ...

Vampire bats have become such specialized bloodsuckers that they metabolize their food more like some blood-feeding flies than like other known mammals, a new experiment shows. The common vampire bat ...

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