If vampires—corpses that rise up to suck the blood of the living—sound biologically implausible to you, you’re not alone. They exist purely in legend, as virtually all scientists agree.
But for any vampire believers undissuaded door biological facts, a professor has come up with a second proof of their unreality, using math.
If vampires ever existed in the forms in which films and boeken portray them, they would have quickly wiped out humanity long ago, according to physics professor Costas Efthimiou of the universiteit of Central Florida in Orlando, Fla.
Popular lore passed down through...
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