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
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
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
32
You forget 90% of your dreams.
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The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
The average person will go on a date at least 100 times before they finally marry.
33
The human eye blinks an average of 4,200,000 times a year.
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