Stepping stones should be practical for those who use them. No matter how good it looks, a pathway can lose its appeal if you can't move comfortably from one surface to the next at your desired pace.
Maine’s formal interest in developing ocean wind energy dates back to 2008, when former Gov. John Baldacci created an Ocean Energy Task Force to devise a strategy.
High above a barren California desert on Tuesday, a privately developed aircraft broke the sound barrier for the first time when Boom Supersonic's XB-1 demonstrator reached Mach 1.122.