Host Mark Bennett gazes back into the history of optics and human vision, standing on the shoulders of giants like Al-Hazen, Shen Kuo, and Kepler. (Can you look at history in any direction but back?) He doesn't gaze very closely at macro photography, but does review a smartphone accessory lens that looks both close and wide. And his special guest is world traveler and photographer, plus founder and president of the Elisabeth Kübler-Ross Foundation, Ken Ross.