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.
Colorado, Washington Become First States to Legalize Recreational Marijuana. In a groundbreaking move, Colorado and Washington voters have passed referendums legalizing marijuana for recreational use. The drug is still banned under federal law. Colorado's Proposition 64 to the state's constitution makes it legal for anyone over the age of 21 to possess marijuana and for businesses to sell it. The voters have spoken and we have to respect their will, Colorado Gov. John Hickenlooper said in a statement.