Tech & Science · 2026.09.27
Jezero's less-altered floor rocks complicate a lake-only explanation
Contrasts with the Séitah formation leave shielding and groundwater pathways in play. Lake level alone cannot settle how the Margin unit changed.
Perseverance traces water episodes in Jezero's Margin Unit
Mineral measurements constrain successive groundwater, possible lake and hydrothermal alterations. They do not demonstrate life or absolute dates.
Tech & Science · 2026.09.27
Perseverance's grain counts reveal the limits of reading Martian rock images
The Jezero study counted resolvable grains in selected images. Its measurement rules matter when comparing textures and interpreting water-altered rocks.
Tech & Science · 2026.09.27
Perseverance maps a sequence of Martian water events, not their dates
SuperCam measurements reveal successive changes to Jezero's rocks, while the timing of water episodes remains unresolved.