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Pot Munchies Explained By Re-Tasked Neurons Feb 19, 2015

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Marijuana boosts users' appetities by changing the signals brain cells produce from sated to still hungry. Karen Hopkin reports.

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Hot Chili Peppers Motivate Mice to Burn Fat Feb 17, 2015

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Rodents fed capsaicin voluntarily exercised more than their furry friends on a lower-heat diet. Karen Hopkin reports

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Humans off the Hook for Alaskan Mastodon Extinction Feb 16, 2015

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A reexamination of museum mastodon specimens provides evidence that that last ones were gone from what's called the Beringia region well before any humans showed up. Emily Schwing reports

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Triskaidekaphobia Plays Role in Paraskevidekatriaphobia Feb 13, 2015

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Some random historical facts about the number 13 may be behind some people's irrational aversion to Friday the 13th. Karen Hopkin reports.

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Contraception Could Prevent 15 Million Unwanted Pregnancies Annually Feb 12, 2015

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Fifteen million unwanted pregnancies in 35 low- and middle-income countries could be avoided if women had access to and freedom to use contraception. Cynthia Graber reports

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Preindustrial Pollution Pestered Peru Feb 11, 2015

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Ice cores show a sudden rise in heavy metal air pollution in South America 240 years before the industrial revolution, probably due to metallurgy and mining. Karen Hopkin reports

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Subway DNA Survey Finds Microbes, Mozzarella and Mystery Feb 10, 2015

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Scientists sequenced genetic material found in all 468 New York City subway stations, and nearly half matched no known organism. Christopher Intagliata reports

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Newton Figured Out How Tree Sap Rises Feb 09, 2015

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Buried in one of Isaac Newton's college notebooks is a page on which he fairly accurately theorizes on the process of transpiration in plants, two centuries before the concept was elucidated. Karen Hopkin reports

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Cities Could Win Economically by Losing Olympics Feb 06, 2015

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According to sports economist Andrew Zimbalist, most cities that win the right to host the Olympics will spend far more to prepare for the games than they estimate in their winning bid. Steve Mirsky reports

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Drones Spy On Birds in Flight Feb 03, 2015

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Quadcopters appear to be a relatively benign tool to study the behavior and numbers of wetland birds. Christopher Intagliata reports

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