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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?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
Did you know?
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.