The full moon causes a tidal wave to roll up the Amazon river once in day and once in night for a period of only three weeks in a year. This results in continuous 4m high wave that can be surfed for up to 13km.
14
The Simpsons are responsible for popularizing the word 'meh'.
12
In Mexico, artists can pay their taxes using artwork that they create.
4
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
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
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22