The most expensive cow in the world was sold in 2009 for $1.2 million.
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It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402