After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’
22
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8