The human eye blinks an average of 4,200,000 times a year.
233
The human sigh acts as a physiological reset button.
23
Yawns are more contagious among people with closer relationships.
163
By weight, Bone is five times stronger than steel.
417
You can't tickle yourself.
29
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Our Right Lungs takes more air than our left lung.
194