The Eames' Powers of Ten and Eva Szasz's Cosmic Zoom both came out in 1968 and were based on Kees Boeke's 1957 essay called Cosmic View. This seems like an incredible coincidence. I couldn't find anything online about which film came first or if there was any influence one way or the other, so I thought I'd ask if anyone knows anything about which came out first. Hit me at jason@kottke.org.