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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.