A rodent's teeth never stop growing.
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The world's largest amphibian is the giant salamander. It can grow up to 5 ft. in length.
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The average housefly lives only two weeks.
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In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
9
The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
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There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2