Poor eyesight (myopia) is associated with higher IQ.
232
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
You forget 90% of your dreams.
256
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15