This Rube Goldberg machine, awaiting verification by Guinness Records as the world’s most complicated, waters a flower in 244 simple steps. Along the way, it takes us from the Big Bang through key moments in history, ending with the impending apocalypse. According to Popular Science, members of the Purdue Society of Professional Engineers spent a total of 3500 hours working on this machine. 3500 hours they will never get back.

Watch it go:

More on the mind-boggling process of building the machine at Popular Science.