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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
The longest a person has survived after a heart transplant is 24 years.
Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.
To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.