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.
Marijuana became legal for recreational use in Colorado on New Year's Day. The committee projects revenue of about $610 million from retail and medical marijuana from Jan. 1 of this year to June 30, 2015, the end of the next fiscal year.