The average sperm cell swims at 8 inches per hour.
76
Enamel is hardest substance in the human body.
61
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Your heart will pump about 212 million liters in its lifetime.
26
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The average person's skin weighs twice as much as their brain.
131
Our Right Lungs takes more air than our left lung.
194
The human body contains over a billion miles of DNA.
147