Ask unlimited questions for free
There are more sensory neurons in the tongue than in any other part of the body.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Illicit drug use costs the United States approximately $181 billion every year.
For a complete list of videos, visit our video library