200 Cars Trapped in a California Mudslide Are a Preview for This Winter's El Niño

Hundreds of cars were stranded when a mudslide swamped a Southern California freeway last night in what felt like a chilling dress rehearsal for the El Niño on the way. The mudslide is a reminder that it’s not just heavy rain we need to worry about—heavy rain falling on the state’s parched ground will bring disaster. »10/16/15 9:10pm10/16/15 9:10pm

Self-Driving Cars Are Already Getting Into Accidents [Updated]

Update 06/21: Google has emphasized that none of the accidents its cars were involved with were the fault of its self-driving vehicles, and has updated its recorded miles to nearly a million. With that information, the accident rate for self-driving cars looks less unsettling and a lot more reassuring. »5/11/15 10:23am5/11/15 10:23am

What Would It Take to Drive Boston's Snow to California?

As we deal with two winters in the U.S.—warm and dry out west, cold and snowy in the Northeast—exasperated Californians watched as Boston got nearly 100 inches of snow in a month. The storms brought up a common question among parched westerners: what would it take to ship Boston's snow to California? »2/23/15 5:09pm2/23/15 5:09pm