David Talbott narrates excerpt on You Tube, "Planet Of A Thousand Mysteries," that examines possible role of electric discharge in formation of Valles Marineris on Mars. The Electric Universe theory derided by mainstream as pseudoscience, often offers a more coherent explanation. Talbot provides account how powerful electric arc crossed the face of Mars to carve out smooth sculpted surfaces, a terrain that doesn't resemble the results of geological processes and water erosion. Wal Thornhill also examines Valles Marineris in 2003 article, "Spiral Galaxies & Grand Canyons." It's best to keep an open mind, after all, Earth was once believed the center of our Universe.