NASA's wheeled rovers have revealed an incredible amount about Mars. From and discovering the chemistry of its soil, to the rolling robots have been indispensable in painting a picture of one of Earth's closest neighbors. They are remarkable, but they can't cover a lot of ground -- slow movement is critical to prevent them from tumbling over a cliff or colliding with a rock.
But imagine if they could fly.
Strapping a set of wings to a robot on another planet would open up a whole new way to explore other worlds. "The ability to fly wherever you want, at great speed, for a closeup view without risk of damage from collision or fall, is a thrilling capability," says Alan Duffy, a professor in astrophysics at Swinburne University in Australia.