Enamel is hardest substance in the human body.
61
A person can live without food for about a month, but only about a week without water.
156
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
We share 70% of our DNA with a slug.
218
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
Mushrooms are more closely related to humans than they are to plants.
47
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