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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?
More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.
Did you know?
If you could remove all of your skin, it would weigh up to 5 pounds.