Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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When you shave a guinea pig it looks like a little hippo.
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In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
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Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
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Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
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