NASA Mars Helicopter Heard Humming Through Thin Martian Air

In this image taken by the Mars Perseverance rover and made available by NASA, the Mars Ingenuity helicopter (R) flies over the surface of the planet on April 30, 2021. NASA/JPL-Caltech/ASU/MSSS via AP

CAPE CANAVERAL, Fla.—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 Friday, just before Ingenuity was set to soar on its fifth test flight.