Kgnu - How On Earth

HEADLINES: Diabetes Drug Metformin - University of Pennsylvania Researcher Morris Birnbaum reports in Nature that Metformin blocks a hormone that tells the liver to melt muscle to make more blood sugar. (Go here for an extended interview with Morris Birnbaum) Climate Change - Research shows that timely political action has a bigger impact than waiting. Boulder Cafe Scientifique - Tonight's Cafe Sci features CU Boulder researcher Monique LeBourgeois (who we interviewed in detail in previous broadcast) on the topic of kids and sleep. MAIN FEATURES: We talk with scientists who are part of two new University of Colorado - Denver studies about alcohol and marijuana - 1) Ben Crost presents a study of marijuana use versus alcohol use which concludes that the minimum drinking age of 21 increases marijuana use among teens (until age 21, alcohol use is lower and marijuana use is higher.  After age 21, alcohol use goes up and marijuana use goes down).  Daniel Rees and Mark Anderson are among the authors on a