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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Did you know?
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Did you know?
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Did you know?
Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

