For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Your heart will pump about 212 million liters in its lifetime.
26
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
Your thumb is about the same size as your nose.
124
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
You see your nose at all times, your brain just chooses to ignore it.
30
The human sigh acts as a physiological reset button.
23