By weight, Bone is five times stronger than steel.
417
Your fingernails grow faster in summer.
744
The average sperm cell swims at 8 inches per hour.
4
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
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.
34
The human brain has the capacity to store everything that you experience.
4k
Enamel is hardest substance in the human body.
61