You can solve the Traveling Salesman problem using glue and paper clips.

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Adleman mimicked this process in the laboratory, and used it to solve something called the traveling-salesman problem.

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"People forget about the over-your-shoulder problem when traveling, " she said.

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Zouheil had a medical problem which prevented her from traveling.

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The problem is that the country you are traveling to will not let you enter.

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