There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
You forget 90% of your dreams.
256
The human eye blinks an average of 4,200,000 times a year.
233
One human hair can support 3 ounces.
191
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
Your fingernails grow faster in summer.
744
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515