Enamel is hardest substance in the human body.
61
It takes approximately 12 hours for food to entirely digest.
93
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
94
Gorillas can catch human colds and other illnesses.
205
Your thumb is about the same size as your nose.
124
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Every human spent about half an hour as a single cell.
144
