Nasa scientists have released eerie audio samples of Martian sounds captured by its InSight lander on Mars.
The probe recorded the low rumble of so-called marsquakes and a symphony of other otherworldly sounds.
InSight's seismometer detected more than 100 events, but only 21 are considered strong marsquake candidates.
The rest could be marsquakes - or something else.
Scientists released an audio sampling, which have been enhanced for humans to hear, on Tuesday.
The French seismometer is so sensitive it can hear the Martian wind as well as movements by the lander's robot arm.
"It's been exciting, especially in the beginning, hearing the first vibrations from the lander," said Imperial College London's Constantinos Charalambous, who helped provide the audio recordings.
"You're imagining what's really happening on Mars as InSight sits on the open landscape," he added in a statement.
InSight arrived at Mars last November and recorded its first seismic rumbling in April.
