A marijuana plant is displayed during the 2016 Cannabis Business Summit & Expo on Jun. 22 in Oakland, Calif. Justin Sullivan/Getty Images hide caption
cannabis
Tuesday
Thursday
Ancient, whole female cannabis plants discovered in a tomb in northwestern China. Courtesy of Economic Botany 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
Thursday
Monday
A strain of high-cannabidiol marijuana is used to create extracts used in experimental epilepsy treatments. GW Pharmaceuticals hide caption
Marijuana Extract May Help Some Children With Epilepsy, Study Finds
Saturday
Sen. Rand Paul waves to supporters in Denver after he spoke to a closed meeting of cannabis business leaders earlier in the day. David Zalubowski/AP hide caption