A budtender prepares an edible sale for a customer at LivWell Broadway in Denver. Craig F. Walker/Denver Post via Getty Images hide caption
marijuana
Wednesday
Tuesday
The psychoactive ingredient in marijuana is a fat-soluble compound called THC. iStockphoto hide caption
Thursday
Thursday
Alaska legalized pot this year and is the first state to have pot cafes where people can consume marijuana. Mark Thiessen/AP hide caption
Alaska's Pot Cafes Will Give Patrons A Taste Of Cannabis
Monday
This second-generation prototype of a marijuana field tester being developed at Washington State University is larger than the planned final product. Tom Banse/KUOW hide caption
High On The Highway: Scientists Try To Build A Marijuana Breath Test
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
Wednesday
Thursday
Customers browse samples at Shango Cannabis shop, after the first day of legal recreational marijuana sales began at midnight in Portland, Ore., Thursday. Steve DiPaoloa/Reuters /Landov hide caption
Monday
Friday
Partygoers attend a Prohibition-era themed New Year's Eve party celebrating the start of retail pot sales, at a bar in Denver on Dec. 31, 2013. Brennan Linsley/AP hide caption
Awesome Tips, Dude: Denver May Allow Pot In Bars, Restaurants
Friday
Hard to resist. But if they're marijuana edibles, not such a treat. James A. Guilliam/Getty Images hide caption
Wednesday
Ohio's proposal to legalize recreational and medical marijuana is being met with opposition from residents who generally support legalizing pot. iStockphoto hide caption
Fears Of Marijuana 'Monopoly' In Ohio Undercut Support For Legalization
Wednesday
More Washington Drivers Use Pot And Drive; Effect On Safety Disputed
Wednesday
Its legal status and wide range of uses make marijuana a tough plant to regulate — or even to advise farmers about. Here, young marijuana plants are seen at a growing facility. Elaine Thompson/AP hide caption
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