Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
Your heart will pump about 212 million liters in its lifetime.
26
Yawns are more contagious among people with closer relationships.
163
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Your body is creating and killing about 2.4 million red blood cells per second.
17
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515