Enamel is hardest substance in the human body.
61
Vaccines contain formaldehyde, ethylene glycol (antifreeze), phenol (disinfectant / pesticide), and aluminum.
-14
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
During a typical human life span, the human heart will beat approximately 2.5 billion times.
21
By weight, Bone is five times stronger than steel.
417
Each nostril of a human being register smell in a different way. Smells that are made from the right nostril are more pleasant than the left.
38
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
A toothbrush within 6 feet of a toilet can get airborne bacteria from flushing.
15