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NASA Explains Coral-Like and Helmet-Shaped Mars Rocks as Ancient Mineral Formations

High-res imaging reveals formation through mineral deposition by ancient groundwater then millennia of wind erosion, countering theories of alien or living origins.

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Esta roca fue capturada por el vehículo diseñado para explorar el planeta rojo el 5 de agosto de 2025. 

Overview

  • Curiosity’s ChemCam Remote Micro Imager captured a 2.5-centimeter coral-like structure in Gale Crater earlier this month that prompted widespread speculation.
  • Perseverance’s Mastcam-Z imaged a helmet-shaped target named ‘Horneflya’ on August 5, highlighting a nodular texture formed by concentrated spherules.
  • JPL spokesperson David Agle and Curiosity team scientists attribute both shapes to mineral deposition in ancient Martian groundwater followed by wind-driven erosion.
  • Researchers emphasize these findings reinforce evidence that Mars once harbored liquid water and potentially habitable conditions but do not indicate present life or artifacts.
  • NASA and JPL teams use high-resolution rover imaging to debunk pareidolia-driven interpretations and advance understanding of Martian geological processes.