We is the person , saw the elephant is the subject, and at the zoo is the place
It was beneficial because it brought many new foods and livestock to different parts of the world promoting more agriculture
It was detrimental because the Europeans killed over 90% of the Native American population
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So for years, scientists have been trying to use cloning techniques to make embryonic stem cells that are essentially a genetic match for patients. The idea is that such a close match would prevent their bodies from rejecting the cells. "It's been a holy grail that we've been after for years,"
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