Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
The human brain doesn't stop developing until about 25 years old.
102
If your DNA was stretched out it would reach to the moon 6,000 times.
256
The human body contains over a billion miles of DNA.
147
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
You forget 90% of your dreams.
256