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
The human body contains over a billion miles of DNA.
147
A human being loses an average of 40 to 100 strands of hair a day.
133
One human hair can support 3 ounces.
191
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
The human sigh acts as a physiological reset button.
23
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The average sperm cell swims at 8 inches per hour.
76