IMAGE CREDITS
Earth Through Deep Time — Archer Wu
Last updated: 21 July 2026

The historical scenes in this website are scientific or artistic reconstructions. They are not photographs of the ancient Earth. Cropping and WebP conversion were used only to fit the page; no animals, landscapes or scientific details were added to the source illustrations.

1. assets/archer-logo.png
   Archer Wu logo supplied for this website.

2. assets/blue-marble.jpg
   The Blue Marble, photographed by the Apollo 17 crew, 7 December 1972.
   Credit: NASA.
   Source: NASA / Visible Earth.

3. assets/hadean-reconstruction.webp
   Meteorites bombarding a molten landscape, used as one possible reconstruction of part of the Hadean.
   Credit: NASA's Goddard Space Flight Center Conceptual Image Lab.
   Source page: https://science.nasa.gov/image-detail/osirisrexshot/
   Note: NASA describes the image as an illustration of the proposed Late Heavy Bombardment. The website caption makes clear that this is not a complete or settled picture of the Hadean.

4. assets/archean-reconstruction.webp
   Artist's concept of the early Earth, used to illustrate a possible Archean coast and ocean.
   Credit: NASA.
   Source page: https://astrobiology.nasa.gov/news/habitability-of-the-young-earth-could-boost-the-chances-of-life-elsewhere/

5. assets/snowball-reconstruction.webp
   Artist's impression of a largely ice-covered “Snowball Earth”.
   Credit: NASA.
   Source page: https://astrobiology.nasa.gov/news/sustaining-aerobic-eukaryotes-on-snowball-earth/

6. assets/cambrian-reconstruction.webp
   Cambrian period reconstruction from the USGS “Trek Through Time” series.
   Credit: Diorama by Masato Hattori; U.S. Geological Survey.
   Source page: https://www.usgs.gov/media/images/trek-through-time-graphics-cambrian
   Rights: Public domain, as stated by USGS.
   Modification: The surrounding plaque text and map were cropped away.

7. assets/carboniferous-reconstruction.webp
   Carboniferous period reconstruction from the USGS “Trek Through Time” series.
   Credit: Diorama by Masato Hattori; U.S. Geological Survey.
   Source page: https://www.usgs.gov/media/images/trek-through-time-graphics-carboniferous
   Rights: Public domain, as stated by USGS.
   Modification: The surrounding plaque text and map were cropped away.

8. assets/jurassic-reconstruction.webp
   Jurassic period reconstruction from the USGS “Trek Through Time” series.
   Credit: Diorama by Masato Hattori; U.S. Geological Survey.
   Source page: https://www.usgs.gov/media/images/trek-through-time-graphics-jurassic
   Rights: Public domain, as stated by USGS.
   Modification: The surrounding plaque text and map were cropped away.

9. assets/cretaceous-reconstruction.webp
   Cretaceous period reconstruction from the USGS “Trek Through Time” series.
   Credit: Diorama by Masato Hattori; U.S. Geological Survey.
   Source page: https://www.usgs.gov/media/images/trek-through-time-graphics-cretaceous
   Rights: Public domain, as stated by USGS.
   Modification: The surrounding plaque text and map were cropped away.

10. assets/paleocene-reconstruction.webp
    Paleocene reconstruction from the USGS “Trek Through Time” series.
    Credit: Diorama by Aldo Chiappe, courtesy of National Geographic; U.S. Geological Survey.
    Source page: https://www.usgs.gov/media/images/trek-through-time-graphics-paleocene
    Rights: Public domain, as stated by USGS.
    Modification: The surrounding plaque text and map were cropped away.

11. assets/pleistocene-reconstruction.webp
    Pleistocene reconstruction from the USGS “Trek Through Time” series.
    Credit: Diorama by J. Matternes, courtesy of the Smithsonian; U.S. Geological Survey.
    Source page: https://www.usgs.gov/media/images/trek-through-time-graphics-pleistocene
    Rights: Public domain, as stated by USGS.
    Modification: The surrounding plaque text and map were cropped away.

NASA imagery is credited in accordance with NASA's media usage guidance. The USGS source pages explicitly mark the selected “Trek Through Time” plaques as public domain.