When the next Mars rover launches in 2020, it will sport a sidekick: a football-sized scout helicopter.

Mars’s atmosphere is 1 percent as dense as Earth’s, so the copter will have to fly at the equivalent of 100,000 feet — 60,000 feet higher than any Earth-bound chopper has ever flown.

Read/listen to my full story at KJZZ’s Arizona Science Desk:
Mars 2020 Rover Mission To Include Scout Helicopter