Ask unlimited questions for free
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
On average, the stomach produces 2 L of hydrochloric acid per day.
There are more sensory neurons in the tongue than in any other part of the body.
Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
For a complete list of videos, visit our video library