Speaking of historical satellite imagery, Bill Morris went digging for satellite imagery of what preceded Manicouagan Reservoir before it was created in the 1960s by Quebec’s massive hydro dam projects. But since Landsat first launched in 1973, after the dam was completed, what imagery was there? Answer: CIA spy satellite imagery from 1965—when satellites took pictures on film that was then sent back to Earth—that was declassified in 1996. Read more.