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Starship Millenium Voyage: Sharks
Very good overall sharks page that concludes with two sections that include shark interactions with man and threats by man.
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Johns Hopkins: "Predators Promise"
A good article focused on the issue surrounding the possibility that sharks may hold some key to curing cancer.
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Gerontology Research Group: Sharks Do Get Cancer
An article that is interesting given the shark cartilage industry relevant to the controversy about sharks and cancer.