And one strategy they used, in addition to framing the discovery more sympatheticaly, was that Marshall swallowed a solution made up of the bacteria he said gave people ulcers and he showed how sick it could make a human being.

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The first cloning of a human embryo shows how costly copying a sick person's cells would be.

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Unlike human fishing techniques, which tend not to discriminate between sick and healthy specimens, sharks are selective: they target weakened prey, thereby keeping fish populations healthy and strengthening the gene pool.

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We are sick and tired of being seen as a stereotype and not as a full human being.

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Every time human settlers stepped into those areas in serious numbers, they got bit, then they got sick, and then, until very recently, most of them backed off.

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