The human eye blinks an average of 4,200,000 times a year.
233
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
The human brain doesn't stop developing until about 25 years old.
102
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
The human brain uses approximately as much energy as a 10 watt light bulb.
120
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
160
The average sperm cell swims at 8 inches per hour.
4