The human brain doesn't stop developing until about 25 years old.
102
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
Your heart will pump about 212 million liters in its lifetime.
26
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
One human hair can support 3 ounces.
191
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217