Enamel is hardest substance in the human body.
61
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
Poor eyesight (myopia) is associated with higher IQ.
232
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Your heart will pump about 212 million liters in its lifetime.
26
Yawns are more contagious among people with closer relationships.
163
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99