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
Redheads require up to 20% more anesthesia to be knocked out.
112
Your heart rate can rise as much as 30% during a yawn.
69
The smallest human penis ever recorded was just 5/8 of an inch long!
77
Every cigarette smoked cuts at least five minutes of life on average, which is roughly the time it takes to smoke one cigarette.
118
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Kissing an infection-free partner is good for your teeth!
141
