NASA Mars helicopter scout drone - image

[Frank S]

I’m calling BS on this because blades need atmosphere!

Well there is an atmosphere on Mars it is just quite thin or on the surface about equal to being at 80 to 90,000 feet above sea level here on earth.
Disregarding any of the military aircraft the only other winged aircraft to ever reach anywhere close to that height was the Airbus Perlan a glider that reached 76,124 ft
So yes it is theoretically possible for a powered rotary winged aircraft to fly on Mars providing the swept area, and the cord of the rotors have sufficient surface area. But to do this remotely without human support on the surface is going to be highly improbable but I have already explained how that could be accomplished in theory of course.