Mars, I hear you. I’ve detected some quiet but distinct shaking on #Mars. The faint rumbles appear to have come from the inside of the planet, and are still being studied by my team. Take a listen.👂https://t.co/GxR1xdRx1F pic.twitter.com/Z8Hn03jigO

— NASA InSight (@NASAInSight) April 23, 2019