Don't know if any of these would be "sources," but perhaps they can refer you
to the companies/individuals who produced their murals.

Places with large murals on:

Evolution:
    National Museum of Natural History, Smithsonian Institution
    George C. Page Museum, Los Angeles, CA

Plate tectonics:
    New Mexico Museum of Natural History and Science, Albuquerque, NM

Dinosaurs:
    Lots of examples, but NM Mus. Nat History might be place to start

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