One out of 20 people have an extra rib.
66
Unlike dogs, pigs, and some other mammals, humans cannot taste water. They taste only the chemicals and impurities in the water.
95
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15
The heart pumps about 1 million barrels of blood during an average lifetime!
30
Enamel is hardest substance in the human body.
61
Pain occurs when sounds are above 130 db.
123
The human heart creates enough pressure to squirt blood 30 ft.
37

