On average a woman has 4 sexual partners in her lifetime.
-143
It takes about 20 seconds for a red blood cell to circle the whole body.
102
The human sigh acts as a physiological reset button.
23
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
Your heart will pump about 212 million liters in its lifetime.
26
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515