"We've learned it's important to set up vivid analogies, " said Lyle Tomlinson, a 24-year-old neuroscience graduate student from Brooklyn who's working as a teaching assistant, noting he used the effects of caffeine in a morning cup of coffee to begin a discussion on the nervous system.

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And at the time the photo was taken, he was a student at the Rochester Institute of Technology, who was working as an assistant to the Magnum photographers.

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