It takes about 20 seconds for a red blood cell to circle the whole body.
102
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The human brain doesn't stop developing until about 25 years old.
102
The human sigh acts as a physiological reset button.
23
Poor eyesight (myopia) is associated with higher IQ.
232
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34