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  1. > Liquid water is one of the key ingredients for life, and it plays a vital role in making a planet habitable. Long ago, Mars had plenty of it—especially during its early Noachian and Hesperian periods, which lasted until about 3 billion years ago. However, over time, as the planet grew colder and drier during the Amazonian period, water disappeared from the surface. A major mystery scientists are now trying to solve is whether any of that water still exists underground today.

    > To dig into this mystery, the team of geologists and geophysicists turned their focus to the planet’s crust. They suspected that its internal structure could hold the key to finding hidden water. Using seismic data from NASA’s InSight mission, the scientists analyzed the wave patterns created by two massive meteorite impacts (named S1000a and S1094b) and the largest marsquake ever recorded (S1222a).

    > Their analysis revealed something remarkable—a zone 5.4 to 8 kilometers deep where seismic waves slowed down significantly. This slowdown could mean the presence of liquid water at the base of Mars’ upper crust. The team estimated a maximum water content of 520–780 meters of Global Equivalent Layer (the thickness of a water layer uniformly distributed across the entire surface of Mars), assuming the pores are entirely filled with liquid water.

  2. Leptonshavenocolor on

    I predict that as astronomical studies and measurements increase and are better refined, we will discover the “ingredients for life” to be far more present than we expected yet we still won’t know what the catalyst was for earth to kick off life for hundreds of years if ever.

  3. Hit the location with a tungsten rod from space and see if any comes out… For science…

  4. This has been theorized for quite a while now. Kim Stanley Robinson wrote about it in the Mars Trilogy back in the 90s. Nice that we are getting some actual evidence now though!