Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Some breeds of chickens lay colored eggs!
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The venom of the king cobra is so deadly that just one gram of it can kill 150 people.
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Rats multiply so quickly that in 18 months, two rats could have over a million descendants.
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A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
There is a species of clam that can grow up to four feet long and weigh up to 500 pounds.
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