Ask unlimited questions for free
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
The average office desk has 400 times more bacteria on it than a toilet.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
For a complete list of videos, visit our video library