Science

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If you happen to find yourself waiting out a flight delay at the airport in Madison, Wis., look on the bright side: You'll have more time to browse an exhibit that unites art and science.

General Motors announced Tuesday that its long-awaited Chevrolet Volt hybrid, a battery- and gas-powered electric vehicle, can get 230 miles per gallon in city driving, dwarfing every other car on the market in fuel efficiency.