China’s next Mars explorer is not a rover that crawls or a helicopter that hovers, but a hybrid drone that can roll across the ground and then leap into the thin air when terrain turns hostile. By ...

It’s always good news when we hear about NASA’s “out-of-this-world” next steps toward building a replacement for Ingenuity, the small Mars helicopter-drone. With 72 flights over 1,004 days, Ingenuity ...