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Published February 14, 2012, 12:00 AM

Making ice cream


Mary Davis (left) and Rich Jaworski, vice president of operations, programs and collections at the Duluth Children's Museum, work together to make ice cream using liquid nitrogen. "We pour vaporized liquid nitrogen at minus 320 degrees Fahrenheit and it looks like a big steaming cauldron. The kids are all excited about that and within about five minutes we have ice cream," said Davis. Photo by Thomas Vaughn for the Budgeteer
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