Viking 2 on the surface of Mars NASA/JPL-Caltech
NASA鈥檚 Viking 2 lander probably discovered quakes on Mars almost 50 years ago, but this has only just been confirmed thanks to data from the more recent InSight probe.
In 1975, NASA launched two missions to Mars, Viking 1 and 2, to study the planet’s surface and search for life. Both probes were also equipped with a seismometer to hunt for marsquakes, tremors on the Martian surface similar to earthquakes, to see if they existed.
Viking 1鈥檚 seismometer failed to operate, but Viking 2鈥檚 worked for two years. While rudimentary, the…
