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Did you know?
The human body produces and destroys 15 million blood cells every second.
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
The longest a person has survived after a heart transplant is 24 years.
Did you know?
Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
Did you know?
Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.