What significant discovery was made about water ice on Mars by the Planetary Science Institute?

Researchers from the Planetary Science Institute identified a large, previously unrecognized reservoir of water ice in Mars' Nereida Montes region. Radar examination revealed that one of these viscous flow features is approximately 500 meters thick and almost 100% ice with a debris covering. This discovery could represent one of the largest concentrations of water ice in any non-polar area in the southern hemisphere of Mars. These water ice deposits, detected using data from NASA's Mars Reconnaissance Orbiter, date to within the last few million years of the planet's history and could serve as a potential water source for future astronauts.