When most people think about Mars, they picture a dry, dusty planet, but a new study from NASA's Perseverance Rover suggests that may not have always been the case. The Perseverance Rover has been exploring Jezero Crater since 2021, and its findings point to Mars having more varieties of water than scientists thought.

Researchers found evidence of groundwater, lakes, and even heated underground water systems once interacting with each other in the same area, leaving a detailed geological record. For water professionals, the findings reinforce water’s extraordinary ability to shape its environment while also leaving clues about the past.

The Perseverance Rover found igneous rocks that preserved evidence of groundwater, lake water, and a hydrothermal event involving heated underground water.

Just as Mars researchers are reconstructing the planet's history through evidence left by water, today’s earthly water utilities use science and monitoring to understand the history and health of local watersheds, aquifers, rivers and reservoirs. Geology matters. Minerals dissolved in water influence everything from treatment processes to infrastructure management. Understanding those interactions helps water professionals provide safe, reliable drinking water every day.