Scientists confused by all the water they’re finding on Mars

NASA scientists have discovered potential liquid water beneath Mars' South Pole, initially finding a large subsurface lake in 2018. Further analysis by a different NASA team revealed dozens of similar radar reflections, suggesting more widespread water or other phenomena. However, many signals were found in areas too cold for liquid water, leading to uncertainty about their nature. The findings imply either common liquid water beneath Mars' South Pole or alternative explanations for the radar signals.

What did NASA scientists discover about liquid water beneath the South Pole of Mars?

What evidence did researchers find in 2018 regarding subsurface lakes on Mars?

What did the new NASA team find in their analysis of radar data?

What uncertainty do researchers have about the signals found in the new studies?

What implications do the findings suggest about the presence of liquid water or other phenomena beneath Mars' surface?