Video: Doggies Donate Blood to Help Fellow Canines

Sure, blood transfusions are critical for humans. But they can also help dogs heal -- and not just in the command sort of way. Advances in veterinary medicine are making it possible for man's best friend to become canine blood donors and save the lives of their other four-legged friends, KFSN reports.

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How Vampire Bats Detect Blood

Scientists have known for years that when vampire bats tear through an animal's skin with their razor-sharp teeth, their noses guide them to the best spots -- where a precise bite will strike a vein and spill forth nourishing blood. But nobody knew exactly how bats knew where to bite.

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