Thursday, January 13, 2005


comes this picture of the Princeton University campus, spring 1974.

Princeton University, 1974.

And no, it doesn’t look that way because of any, er, ahh...chemicals that may or may not have been ingested by the photographer. Shame on you! Just because it was the 1970’s!

No, it’s because the picture was taken using a deep yellow filter and Ektachrome Infrared Aero, a false-color transparency film that renders infrared as red. Since chlorophyll is a strong infrared reflector, healthy trees and grass appear red in the photograph. This technology is still used today to monitor the health of natural areas by aerial and satellite observation.

Bet you didn’t know that! Bet you didn’t give a shit, either.

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