The lead author of the research says he does not know if the shoe was made for a man or a woman.

VOA: special.2010.08.03

Nguyen also had his own one-man research firm, Insight Research, LLC.

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In fact, according to the New York State Biodiversity Research Institute, that man-caused influence comes in fifth behind habitat degradation and loss, non-native invasive species, pollution, and overuse of resources.

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The research is funded by a man whose 10-month-old son died after a heart operation.

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