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.
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Dogs have been man's pet for over 14,000 years.
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The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
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Cats recognise the voice of their owner, but never evolved to care.
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When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
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When cats are happy, they may squeeze their eyes shut.
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Tigers can see 6 times better at night than humans.
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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.
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