An ocean's worth of water may be buried within Mars, but can we get to it?

Enough water to cover the surface of Mars has been discovered within the crust of the Red Planet by NASA's InSight mission. However, the ocean is buried several kilometres underground. Insight touched down in the Elysium Planitia region on Mars in November 2018 and maintained its mission for four years.

- Keith Cooper

Armed with the first seismometer to be taken to the Red Planet, it detected 1,319 marsquakes. Geophysicists Vashan Wright and Matthias Morzfeld of the Scripps Institution of Oceanography and professor of planetary science Michael Manga of the University of California, Berkeley, have used that seismometer data to discover water on the planet.