Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Your heart will pump about 212 million liters in its lifetime.
26
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
Pain occurs when sounds are above 130 db.
124
Obsessive nose picking is called Rhinotillexomania.
101
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
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