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
The human eye blinks an average of 4,200,000 times a year.
233
Gorillas can catch human colds and other illnesses.
205
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
Poor eyesight (myopia) is associated with higher IQ.
232
Only humans shed emotional tears.
331
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99