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
Your thumb is about the same size as your nose.
124
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
All 13 minerals necessary for human life can be found in alcohol beverages.
282
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
Mushrooms are more closely related to humans than they are to plants.
47
Early American humans hunted car-size armadillos and used their shells for houses.
12
Enamel is hardest substance in the human body.
61