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.
(Ed Andrieski/AP) DENVER â Marijuana for recreational use became legal in Colorado Monday, when the governor took the procedural step of declaring the voter-approved change part of the state constitution. Colorado became the second state after Washington to allow pot use without a doctor's recommendation.