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Four-panel full-color pop-history comic. Panel 1: Mars surface with decorrelation stretch. Panel 2: Dstretch plug-in chalkboard. Panel 3: Baja cave yellow figure appears. Panel 4: Angkor Wat chamber with 200-plus revealed paintings.
Four panels: Mars stretch before/after, Dstretch plug-in badge, Baja yellow figure reveal, Angkor Wat 200+ paintings. Pop-history entertainment. · Comic: Topics / Drew’s Comic Newsroom. Source: PetaPixel / NASA JPL.

Conspiracy Theories

A Mars photo trick helps find faded rock art on Earth

What happened

PetaPixel, dated 9 September 2026, recounts how a NASA Jet Propulsion Laboratory visualization called a decorrelation stretch — built to tease color variation out of Mars rover and satellite scenes — inspired mathematician and rock-art enthusiast Jon Harman to build the Dstretch plug-in. After seeing Mars before-and-after frames at a 2005 rock-art conference, Harman dug up a NASA paper on the algorithm and ported the idea into open-source image tools, later apps. Applying it to Cave of San Borjitas imagery from Baja California pulled a yellow figure out of near-invisibility — the moment he knew the method was useful for faded Earth art.

Between 2010 and 2012, Singaporean archaeologist Noel Hidalgo Tan used Dstretch around Cambodia’s Angkor Wat complex and documented more than 200 faded paintings almost invisible to the naked eye. The tool has since turned up undocumented figures from Egypt to Canada to Greece and even enhanced tattoos on mummified remains. This desk files pop-history entertainment with the science punchline intact: a Mars geology aid became an Earth heritage aid. Hard house rule: never politics, never antisemitism, never a conspiracy-of-people framing. Weird-but-sourced tool crossover only.

Conspiracy here means entertainment and unexplained-adjacent oddities with a receipt. A Mars stretch that rescues cave paint is the right shape: weird, dated, and still fun after the algorithm lesson. Bright ochre, teal, and temple gold. White gutters. Not a claim of hidden empires and not a sermon.

Why it matters

Readers get the JPL technique name, Harman’s Dstretch, the Baja yellow figure, and Tan’s 200-plus Angkor finds. Keep politics out. Keep the PetaPixel URL on the page. A tool story that travels from Mars pixels to temple walls is a clean pop-history slot for this batch.

Conclusion

NASA JPL’s decorrelation stretch, adapted by Jon Harman as Dstretch, revealed a Baja yellow figure and helped Noel Hidalgo Tan document 200-plus Angkor Wat paintings, per PetaPixel. Source: https://petapixel.com/2026/09/09/a-nasa-photo-processing-technique-to-study-mars-has-discovered-ancient-art-on-earth/

Source: PetaPixel