Artist Salvador Dali would often get out of paying for drinks and meals by drawing on the cheques, making them priceless works of art and therefore un-cashable.

If you could drive your car straight up you would arrive in space in just over an hour.

Frog-eating bats identify edible frogs from poisonous ones by listening to the mating calls of male frogs. Frogs counter this by hiding and using short, difficult to locate calls.

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