Pope Francis was once a nightclub bouncer.
7
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
Passengers on the Beijing subway can pay with plastic bottles.
29
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
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