“If I heard these sounds driving my car, I’d pull over and call for a tow,” Dave Gruel, an engineer on the rover team, said in a written NASA statement. “But if you take a minute to consider what you’re hearing and where it was recorded, it makes perfect sense.”
Perseverance — the biggest, most advanced rover ever sent to Mars — landed near an ancient river delta on Feb. 18 to search for signs of past life. Samples will be taken from the most promising rocks for eventual return to Earth.
The rover carries two microphones. One already has captured the sounds of wind and rock-zapping lasers, the other was meant to record the descent and landing. This second mike didn’t pick up any sounds of the rover’s arrival at Mars, but managed to record the first test drive March 4.
The driving audio contains a unexpected high-pitched scratching noise, according to NASA. Engineers are trying to figure it out.
Before it starts drilling into rocks for core samples, Perseverance will drop off an experimental tag-along helicopter, named Ingenuity. The helicopter will attempt the first powered, controlled flight on another planet sometime next month.