The human eye blinks an average of 4,200,000 times a year.
233
The average person's skin weighs twice as much as their brain.
131
A man's beard grows fastest when he anticipates sex.
239
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The human brain doesn't stop developing until about 25 years old.
102
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
You forget 90% of your dreams.
256