On average, there's 100 billion neurons in the human brain.
83
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
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
About 400 different kinds of microbes live on and in the human body.
-3
The Internal Revenue Service audits 87 percent of women who claim breast implants as tax deductions.
54
You inhale about 700,000 of your own skin flakes each day.
29