On average, there's 100 billion neurons in the human brain.
83
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
If the human eye was a digital camera, it would have 576 megapixels.
25
By weight, Bone is five times stronger than steel.
417
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
You forget 90% of your dreams.
256