9. It costs the U.S. Mint almost twice as much to mint each penny and nickel as the coins are actually worth. Taxpayers lost over $100 million in 2013 just through the coins being made.
10. Light doesn't necessarily travel at the speed of light. The slowest we've ever recorded light moving at is 38 mph.
11. Casu marzu is a Sardinian cheese that contains live maggots. The maggots can jump up to five inches out of cheese while you're eating it, so it's a good idea to shield it with your hand to stop them jumping into your eyes.
12. The loneliest creature on Earth is a whale who has been calling out for a mate for over two decades — but whose high-pitched voice is so different to other whales that they never respond.
13. The spikes on the end of a stegosaurus' tail are known among paleontologists as the "thagomizer" — a term coined by cartoonist Gary Larson in a 1982 Far Side drawing.
14. During World War II, the crew of the British submarine HMS Trident kept a fully grown reindeer called Pollyanna aboard their vessel for six weeks (it was a gift from the Russians).
15. The northern leopard frog swallows its prey using its eyes — it uses them to help push food down its throat by retracting them into its head.
16. The first man to urinate on the moon was Buzz Aldrin, shortly after stepping onto the lunar surface.
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