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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Condoms were originally made of animal intestines or linen.
347
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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The Platypus used to be considered a myth like Bigfoot and the Yeti.
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Unsinkable Sam (nickname of a German ship's cat) who served on 3 warships, one German, two British, all sank in action. The cat survived each sinking, floating away on wooden planks to rescue.
19
Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12