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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?
The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.