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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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.
In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.