Every year your body replaces 98% of your atoms.
119
Every time you sneeze some of your brain cells die.
113
Brain freeze is caused by the brain sensing the drop of temperature on your palate and increasing blood pressure in an attempt to save you from freezing.
14
If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
The average female will have 3.3 pregnancies in her life.
49
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21

