Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
In one day, adult lungs move about 10,000 litres of air.
11
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
The average sperm cell swims at 8 inches per hour.
4
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
You forget 90% of your dreams.
256
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11