Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Surgeons who listen to music during operations perform better than those who don't .
87
Human teeth are almost as hard as rocks!
47
It is possible to go blind from smoking too heavily.
50
The human brain doesn't stop developing until about 25 years old.
102
If you unfolded your brain, it would cover an ironing board.
42
