NASA has released recordings of eerie sounds on Mars picked up by one of its missions to the Red Planet, the InSight lander. Far below the human range of hearing, these recordings had to be speeded up and slightly processed to be audible through headphones, NASA said on Tuesday. The spacecraft’s exquisitely sensitive seismometer, called the Seismic Experiment for Interior Structure (SEIS), can pick up vibrations as subtle as a breeze.
The instrument was provided by the French space agency, Centre National d’Etudes Spatiales (CNES), and its partners. The instrument was designed to listen for quakes on Mars, known as marsquakes. Scientists want to study how the seismic waves of these quakes move through the planet’s interior, revealing the deep inner structure of Mars for the first time.