The most expensive cow in the world was sold in 2009 for $1.2 million.
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Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
The Basenji dog is the only dog that is not able to bark.
4
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
9
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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