Who won the National Medal of Technology in 1991 for designing more than 60 devices to improve food product preservation? What traps warmth, Sprays forth ice and water, Yet slips through your fingers with ease? It goes up, but at the same time goes down. Up toward the sky, and down toward the ground. It's present tense and past tense too, come for a ride, just me and you. What is it?
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