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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.