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List of unsolved problems

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This is a list of articles about unsolved problems in various subjects:

Unsolved problems in mathematics
Unsolved problems in physics
Unsolved problems in chemistry[?]
Unsolved problems in biology
Unsolved problems in economics[?]

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Quackery

... effects from real treatment. Anti-cancer drugs and radical surgery can have very distressing side effects. Illegitimate treatments, e.g. herbal medicines, do not have ...