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Mercury May Be Geologically Active, New Research Reveals

1/28/2026

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Summary

Story summary

Researchers from the University of Bern report Mercury is not a dead planet but may be geologically active.
They detected bright streaks called lineae, likely from outgassing of volatile materials from Mercury's interior.
These lineae mostly appear on sun-facing slopes of young impact craters, suggesting solar radiation drives formation.
The findings imply Mercury continues to lose volatiles, informing future work by the BepiColombo mission.

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Story summary

Researchers from the University of Bern report Mercury is not a dead planet but may be geologically active.
They detected bright streaks called lineae, likely from outgassing of volatile materials from Mercury's interior.
These lineae mostly appear on sun-facing slopes of young impact craters, suggesting solar radiation drives formation.
The findings imply Mercury continues to lose volatiles, informing future work by the BepiColombo mission.