When you take a step, you are using up to 200 muscles.
886
Enamel is hardest substance in the human body.
61
The human brain has the capacity to store everything that you experience.
4k
The human brain uses approximately as much energy as a 10 watt light bulb.
120
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
The average sperm cell swims at 8 inches per hour.
76
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127