Photos of the three principle contributors grabbed from The Jupiter Sheep.
(they might not be exactly... uh... recent)
Brian Levine, Reed Sandburg, Shauna Pickett-Gordon, Monica Dannenberger, Jeremy MacKinnon, Keren Gaiser, Colin Fischer, Nomi Harper, Friedrich Edelmann, John Engle, Julian Barber, Kim Stanley Robinson, Robert Zubrin, Penny Boston, Max Tegmark*, The Mars Society.
*For a reference to a quote by Erwin Schrödinger “…a play before empty benches…”, which spurred the long-delayed completion of the project.
The images used on the song pages were all found on the web many years ago for a different project and I don't know who to thank for them. If any are under copyright and the author does not want them used for this purpose, please email email@example.com.