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Energy-efficient diesel engines are nearly as green as hybrids, thanks to improved technology, exhaust scrubbers, and a new fuel. This article from the March 2007 edition of Scientific American explains.

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Identifying genetic influences on vulnerability to alcohol addiction can lead to more targeted treatments and help those at risk to make informed choices about their lives. Learn more in this article, "Seeking the Connections: Alcoholism and Our Genes", from the April 2007 edition of Scientific American .

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TV broadcasting as we know it is set to end on Feb. 17, 2009. But as this article from the Feb. 2007 edition of Scientific American explains, its legacy could make the transition to digital TV anything but smooth.

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New systems may allow people to record all that has touched their lives, thereby creating a collection of personal digital archives. Learn more in this article "A Digital Life" from the March 2007 edition of Scientific American .