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Audio Alchemy: Getting Computers to Understand Overlapping Speech

The year is 1974, and Harry Caul is monitoring a couple walking through a crowded Union Square in San Francisco. He uses shotgun microphones to secretly record their conversation, but at a critical point, a nearby percussion band drowns out the conversation

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Munching Microbe Rules Methane Production

Landfills produce methane--which can be valuable as an energy source. But scientists haven’t known why landfills make so much methane. The solid waste in landfills is typically at a pH that’s considered too acidic to host methanogens, methane-producing microbes

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Maryn McKenna answers questions about antibiotic resistance

Award-winning science journalist Maryn McKenna participated in a live online chat about antibiotic resistance with Scientific American 's Facebook page fans on April 11. Fingers flew fast as dozens of participants peppered McKenna with comments and questions about her story, " The Enemy Within: A New Pattern of Antibiotic Resistance ," in our April issue, and related topics. [More]

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Immigration Tracked Through Desert Detritus

By Nadia Drake of Nature magazine Every year, thousands of undocumented migrants make the dangerous crossing from Mexico to Arizona in the United States through the Sonoran Desert. [More]

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Forget Organic Farming: Agricultural Technology Is the Way to Go

The article " Food Fight " in the April issue details Roger Beachy's involvement in the birth of genetic engineering of food crops, how he went on to become an avid defender of the new technology and how these beliefs will shape his tenure at the agriculture department's newly formed National Institute of Food and Agriculture. Here he answers four more questions for readers about his own background and agriculture in the developing world. How did your Amish background shape your interest in agriculture

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How Doth Your Native Flora Grow?

Spring is in the air. And so is pollen. Local plants put forth an abundance of the stuff in a bid to ensure their continued existence, even in the hardest concrete jungles.

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