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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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The horizontal fraction bar was introduced by the Arabs.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.