The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
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Cats recognise the voice of their owner, but never evolved to care.
22
Only 3% of bird species have penises.
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Baks the blind boxer has a seeing eye goose named Buttons; a four-year-old goose who leads the pup around everywhere either by hanging onto him with her neck, or by honking to tell him which way to go.
16
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
The most expensive cow in the world was sold in 2009 for $1.2 million.
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