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========== The most dangerous animal on Earth isn’t
the shark, or the lion, or even the hippopotamus. It’s so small, in fact, it could sit on
the tip of this pencil. Biologists estimate that they have killed nearly half of all humans
ever born, and today accounts for more than 45 million years of lost human life every
year. [SLAP] BLEEP mosquitoes. [MUSIC] A mosquito is any of more than 3,000 species
of tiny annoying flies in the family Culicidae. Among those species that feed on blood, the
vampire action is carried out solely by the females, who require the proteins and nutrients
in animal blood in order to lay their eggs. Blood-sucking mosquito species have very discerning
palates when it comes to which species they feed on. Mosquitoes that prefer birds, for
instance, may not suck our blood. Only a few hundr...