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 adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
The human sigh acts as a physiological reset button.
23
The average person's skin weighs twice as much as their brain.
131
One human hair can support 3 ounces.
191