Blue eyes are the most sensitive to light, dark brown the least sensitive.
105
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
Passengers on the Beijing subway can pay with plastic bottles.
29
It takes about 63,000 trees to make the newsprint for the average Sunday edition of The New York Times.
-11
If you flip a coin ten times, the odds against its coming up with the same side showing each time are 1,023 to 1.
39
No matter its size or thickness, no piece of paper can be folded in half more than 8 times.
-64
The ashes of the average cremated person weigh nine pounds.
40
Each day, there are over 120 million sexual intercourse taking place all over the world.
301