The best-performing self-driving vehicle of the moment may not be circling San Francisco. It's on Mars.
According to Ars Technica, about 90 percent of the total distance NASA's Perseverance rover has driven has been covered autonomously — meaning the rover picked its own route rather than following a path plotted step by step by humans back on Earth. Ars Technica calls the first self-driving vehicle on Mars "a smashing success."
That share is the striking part. Autonomous navigation on rovers has historically been a supplement to human driving, used in short bursts on easy terrain while mission teams handled the tricky stretches. A rover that self-drives the overwhelming majority of its mileage is operating in a different mode altogether.
The reason it matters comes down to distance. Radio signals take minutes to travel between Earth and Mars, so nobody can steer a rover in real time — there is no joystick, no live video, no correcting a wheel mid-slip. Traditionally, that meant planners studied images, mapped a route, sent it up, and waited for the rover to finish before planning the next leg. Every meter of self-driving is a meter that doesn't have to wait on that cycle.
More ground covered per day means more places sampled, more rocks examined, and more science squeezed out of a mission with a finite lifespan.
It's a quiet milestone worth noting: the hardest real-world proving ground for autonomous driving turned out to be a planet where no human could take the wheel anyway.