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
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
If you're one in a million, there are about 7,234 people just like you.
31
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
Couples' personalities converge over time to make partners more and more similar.
235
You burn more calories sleeping than you do watching television.
348
Play-Doh was first manufactured as a wallpaper cleaner.
122
160 cars can drive side by side on the Monumental Axis in Brazil, the world's widest road.
39