Ask unlimited questions for free
Green tea is able to stop the scent of garlic or onion from causing bad breath.
There are more bacteria in your mouth than there are people in the world.
Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
There are 20 feet of blood vessels in each square inch of human skin.
The longest a person has survived after a heart transplant is 24 years.
For a complete list of videos, visit our video library