In 2011, a couple bought a box of textbooks for $10. Inside, they found a 25-cent bill signed by the president of the Republic of Texas, Sam Houston, and subsequently sold it for $63,250.
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If you place a ripe banana next to a green tomato, the tomato will ripen due to the ethylene gas produced by the banana.
16
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
The Power Rangers command center is a real building located in a California University.
4
MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
18
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7