The human sigh acts as a physiological reset button.
23
Pain occurs when sounds are above 130 db.
123
All 13 minerals necessary for human life can be found in alcohol beverages.
282
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Only humans shed emotional tears.
331
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
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
Yawns are more contagious among people with closer relationships.
163