"Revisiting Mars' Watery Past: New Insights on Potential for Life"

New research suggests that gullies on Mars may have been shaped by the sublimation of carbon dioxide ice rather than just liquid water, potentially indicating that the planet's history of liquid water and habitability may have been shorter than previously thought. Lab experiments simulating Martian conditions demonstrated that CO2 sublimation can fluidize and sustain granular flows, raising questions about the duration of Mars' habitable period and its potential for supporting life.