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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.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
The longest a person has survived after a heart transplant is 24 years.
People about to have surgery must tell their health care providers about all supplements they take.
Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.