Poor eyesight (myopia) is associated with higher IQ.
232
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Our brains have a negativity bias and will remember bad memories more than good ones.
15
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
Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
252
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
By weight, Bone is five times stronger than steel.
417
The human brain is more active during sleep than during the day.
28