Question 1
Question 2
Ask unlimited questions for free
Vaccines prevent between 2.5 and 4 million deaths every year.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
More than 4.4billion prescriptions were dispensed within the United States in 2016.
There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.
There are 20 feet of blood vessels in each square inch of human skin.
For a complete list of videos, visit our video library