Why are there so many squirrels in U.S. parks? In part because we put them there.

+ Politico Magazine: “Was it really harder to come out as an atheist politician in 2013 than as a gay one 25 years ago? Incredibly, the answer might be yes.”

+ Patrick Moen is the embodiment of the changes in public attitudes towards marijuana. He used to be a DEA supervisor. Now he works for a firm that invests in companies tied to the pot business.

+ From Chinese state media, here are some great things about toxic air.