There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
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
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
The human brain doesn't stop developing until about 25 years old.
102
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118