Mercury is home to exotic salt glaciers, and they could harbor life underneath.

Scientists have discovered that salt glaciers may exist on Mercury, the planet closest to the sun and the smallest world in the solar system. This discovery could show that even the most volatile conditions in the inner solar system can sometimes echo conditions seen on Earth.

The team’s findings complement recent discoveries that revealed Pluto had nitrogen glaciers. Because Pluto exists on the other side of the solar system, both findings imply that glaciation extends from the solar system’s warmest regions, close to the sun, to its frigid outer limits.

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