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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?
Blood is approximately twice as thick as water because of the cells and other components found in it.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Did you know?
The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.