Researchers have found marijuana metabolites in the urine of babies who were exposed to adult marijuana use. deux/Corbis/Getty Images hide caption
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marijuana
Monday
Monday
Marijuana is now legal for recreational or medicinal use in more than half the country, but it's still banned in professional sports. Jack Guez/AFP/Getty Images hide caption
NFL Players Searching For Painkiller Choices Hope For Relaxed Marijuana Ban
Sunday
Alabama Sen. Jeff Sessions at Trump Tower in New York City on Thursday. Many in the multibillion-dollar marijuana industry fear what his nomination for attorney general would spell for business. Drew Angerer/Getty Images hide caption
Shane Cavanaugh, owner of Amazon Organics, a pot dispensary in Eugene, Ore., arranges the cannabis display in his store in September 2015. Ryan Kang/AP hide caption
Friday
Is marijuana a gateway drug to smoking cigarettes? PhotoAlto/Katarina Sundelin/Getty Images hide caption
Wednesday
Krystal Xiques smokes marijuana at a rally in support of Prop 64 at Sparc Dispensary in San Francisco on Tuesday. Marcio Jose Sanchez/AP hide caption
Tuesday
A marijuana plant is displayed during the 2016 Cannabis Business Summit & Expo on Jun. 22 in Oakland, Calif. Justin Sullivan/Getty Images hide caption
Wednesday
Marijuana grows in the home of two medical marijuana patients in Medford, Ore. Jeff Barnard/AP hide caption
How The 'Cannabis Catch-22' Keeps Marijuana Classified As A Harmful Drug
Friday
Libertarian presidential candidate Gary Johnson talks to a crowd of supporters at an August rally in Salt Lake City. George Frey/Getty Images hide caption
Saturday
Diego, a tortoise of the endangered Chelonoidis hoodensis subspecies from Española Island, is seen in a breeding centre at the Galapagos National Park on Santa Cruz Island. RODRIGO BUENDIA/AFP/Getty Images hide caption
Friday
Legalization of recreational marijuana may be a factor influencing increased use college-age young adults. Diverse Images/UIG/Getty Images hide caption
Thursday
Since marijuana doesn't benefit mother or baby it should be avoided, researchers say. But there is stronger evidence for the harms of alcohol and tobacco. Roy Morsch/Getty Images hide caption
Tuesday
Abby McLean of Northglenn, Colo., stands near the stretch of U.S. 85 in Adams County where she was pulled over for a DUI check in September 2014. Nathaniel Minor/CPR News hide caption
Tuesday
The first-place Sativa variety cannabis plant at the Oregon State Fair in Salem. Deena Prichep for NPR hide caption
Cannabis Growers Seek Blue Ribbons For Their Buds At Oregon's State Fair
Wednesday
A marijuana plant is displayed during the 2016 Cannabis Business Summit & Expo last month in Oakland, Calif. Justin Sullivan/Getty Images hide caption