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Remains of Wood Cells on Mars

Thursday, September 11, 2025 0:59

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All articles by Wretch Fossil are here: http://www.wretch.cc/blog/lin440315&category_id=0

Above figure is also displayed at

https://www.flickr.com/photos/fossil_lin/54778511492/in/dateposted-public/

Original figure: https://www.nature.com/articles/s41586-025-09413-0/figures/3

(Note: I used Zeke filter to enhance the colors. I enlarged the original photo by 800%.)

Original article: https://www.nature.com/articles/s41586-025-09413-0

Original caption: a, WATSON nighttime image of Cheyava Falls with both white-light LED groups on acquired on sol 1188 at a stand-off distance of 3.91 cm. Image resolution: 21.0 ± 0.4 µm per pixel. b, Colourized SHERLOC ACI image acquired on sols 1201–1202 outlined with a white box and overlain on the WATSON image from a. The ACI image is a focus merge of 13 ACI images acquired between stand-off distances of 4.035 cm and 4.335 cm and has an image resolution of about 10 µm per pixel. Three 1 × 1 mm SHERLOC spectral scans were acquired at the orange square location at stand-off distances of 4.01 cm, 4.035 cm and 4.06 cm. One 1 × 1 mm spectral scan was acquired at the blue square location at a stand-off distance of 4.035 cm. The black dotted rectangle shows the footprint of the PIXL scan acquired from this target. The magenta cross at the corner of the scan provides a reference point for comparison with c, which is the colourized SHERLOC ACI image from b. The image shows the authigenic nodule and reaction front features as well as the SHERLOC and PIXL scan locations. d, SHERLOC Raman spectra from representative targets in the Bright Angel unit with fits to an instrument –O-stretching overtone feature from the SHERLOC fused-silica optics (light grey, labelled ‘Bknd’) and the G-band signal at about 1,600 cm−1 associated with organic carbon in the targets Walhalla Glades (blue), Cheyava Falls (red) and Apollo Temple (green fit on grey spectrum). Malgosa Crest (yellow) shows no G-band signal above the instrument background. Scale bars, 5 mm. Credit: NASA/JPL-Caltech/MSSS.

In image a, a yellow arrow points to a longitudinal vessel element. In image b and c, red arrows point to wood cells in the transverse sections. Red rectangles in images a and c mark clusters of wood cells in the transverse sections.

Wretch Fossil’s website:http://wretchfossil.blogspot.com/

Source: https://wretchfossil.blogspot.com/2025/09/remains-of-wood-cells-on-mars.html

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