The human brain doesn't stop developing until about 25 years old.
102
By weight, Bone is five times stronger than steel.
417
Your thumb is about the same size as your nose.
124
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Enamel is hardest substance in the human body.
61
Yawns are more contagious among people with closer relationships.
163
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127