Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
35
Enamel is hardest substance in the human body.
61
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
It is possible for you to survive even after the removal of the spleen, the stomach, one kidney, one lung, 75% of the liver, 80% of the intestines, and almost every organ from the pelvic and groin area.
218
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
The average sperm cell swims at 8 inches per hour.
4
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132