Last night, one of the world's most recognizable landmarks took on one of the world's most pressing issues when, from 9 p.m. to 12 a.m., a duo of filmmakers lit up the 102-story building with images of some of earth's most endangered animals. As part of the project Racing Extinction, Travis Threlkel and Louie Psihoyos projected digital light images of a snow leopard, a golden lion tamarin, manta rays and other snakes, birds, fish and mammals onto the skyscraper in an effort to call attention to the creatures' plight (and possibly to provide footage for a coming documentary). Luckily, the pair was blessed with a clear, cool night, and tons of camera-, iPhone- and iPad-wielding Instagrammers turned out to document the event, which they posted under the hashtag #racingextinction. Here are 9 of our favorite shots, with a special shoutout to the first image, of Cecil the Lion, whose trophy-hunting death in Zimbabwe earlier this month has brought renewed attention to the fraught issue of big-game hunting in Africa. RIP, good buddy.