When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Your thumb is about the same size as your nose.
124
One human hair can support 3 ounces.
191
Your heart will pump about 212 million liters in its lifetime.
26
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
All 13 minerals necessary for human life can be found in alcohol beverages.
282
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11