Overview

• NASA's InSight mission detected water up to 20 kilometers underground using seismic data.
• Researchers believe the mid-crust could hold enough water to cover Mars in a 1-2 kilometer deep ocean.
• Water on Mars is also found in polar ice caps, transient frost, and atmospheric vapor.
• The discovery challenges previous assumptions that Mars lost most of its water to space.
• Accessing this deep water poses significant challenges for future exploration missions.