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Sugar is considered critical for achieving a smooth and silky consistency in gelato. But new technology is aiming to achieve the same results with less (or no) sugar. Irina Marwan/Getty Images hide caption

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Irina Marwan/Getty Images

Dishwashers have come a long way since this 1921 model, which was designed mainly to help minimize the drudgery of housework. But today's sleek models are also designed with water conservation in mind. Bettmann/Bettmann Archive/Getty Images hide caption

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Bettmann/Bettmann Archive/Getty Images