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.
In Colorado, marijuana sales totaled $996 million in 2015, up 42% from the $699 million in legal marijuana sales registered in 2014. Of this $996 million, $587.8 million came from the sale of recreational marijuana. Two years prior, recreational marijuana sales would have been $0.