Scientists put the bloodsucking mammals on a treadmill to understand how they get the energy to chase down their next meal. Researchers tracked how vampire bats processed their blood meals as they ...
TONOSI, Panama -- Cattleman Francisco Oliva was on a roundup -- of vampire bats. After a swarm of the blood-slurping creatures dive-bombed his herd and drank their fill one recent night, he corralled ...
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