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.
Retail Marijuana FAQ. Beginning January 1, 2014, it will be legal in Denver for adults over 21 to purchase marijuana for recreational use. Other municipalities in Colorado also allow retail marijuana stores. Please go to each city's website to determine specific marijuana sale and consumption laws.