Science
Mars helicopter heard humming through air – The West Australian
NASA has released the first-ever audio of its Ingenuity helicopter humming through Mars’ thin air, just before it made its fifth test flight.

First came the amazing pictures, then the video. Now NASA is sharing sounds of its little helicopter humming through the thin Martian air.
NASA’s Jet Propulsion Laboratory in California released this first-ever audio on Friday, just before Ingenuity made its fifth test flight, a short one-way trip to a new airfield.
During the fourth flight a week earlier, the low hum from the helicopter blades spinning at more than 2500 revolutions per minute is barely audible. It almost sounds like a low-pitched,…
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