Michael Wesely's Long Exposures

Long exposures can be complicated at 30 to 60 seconds, but somehow Michael Wesely can take 3 year (94,670,777 second) exposures on his self built pinhole camera! I love the series he did for the MoMA renovation in New York. You can literally see the passing of time through the city landscape. He also photographed a series of the life and death of flowers through long exposure.