Dartboards are made out of horsehairs.
129
It has been calculated that every 2 minutes, we take more pictures than all of humanity in the 19th century.
13
A new baby usually deprives each of it's parents around 350-400 hours of sleep in the first year. That is one entire nights sleep per week, per parent.
194
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
Fine-grained volcanic ash can be found as an ingredient in some toothpastes.
55
People who laugh more are better able to tolerate pain - both physical and emotional.
36
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