Dogs have been man's pet for over 14,000 years.
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Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
Cats recognise the voice of their owner, but never evolved to care.
22
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
A giraffe's kick is so powerful that it can decapitate a lion.
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