Featured image: 7,000-year-old skeleton of woman may have been a victim of leukemia, making it the oldest case found.
Story highlights. Colorado began allowing the sale of recreational marijuana on January 1 to anyone age 21 or older. Residents can now buy marijuana like alcohol -- except the cannabis purchase is limited to an ounce, which is substantial enough to cost about $200 or more.
Underground weed: Coloradoâs black market. By Deborah Camiel. If you think Coloradoâs legalization of marijuana retail sales killed the black market, think again. Just a click away on Craigslist are hundreds of unlicensed purveyors of everything from smokable bud to hash oil products for a more potent high.