The rumor is now a fact: Mazda announced today that it would bring back the legendary rotary engine, though not as the main powerplant of a car. Instead, a version of the rotary will act as a range extender in one of two electric vehicles the brand will debut for 2020. As Popular Mechanics noted in our recent feature about the story and legacy of the Wankel rotary, the engine hasn't been featured in a car since the Mazda RX-8 was canceled in 2018. But there have been rays of hope for the rotary faithful. Specifically, rumors swirled earlier this...