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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.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.