Event Brief
Mar 20, 2026 at 2:00 PM ET
Mars Radar Reveals Ancient River Delta
By The BriefBrief
Perseverance's radar has uncovered a hidden ancient river delta on Mars.
WHO: Perseverance
WHAT: revealed ancient subsurface river delta
WHEN: Mar 20, 2026 at 1:18 PM ET
WHERE: Mars
WHY: Discovery of a hidden delta beneath the surface.
How this brief is built: The BriefBrief correlates multiple sources into one evolving event brief, updated as new facts emerge.
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