Alberta, Canada until April 12, 2015: In an era when checking the time often involves consulting a device that is proficient at enticing us to waste it, Christian Marclay’s tour de force installation The Clock offers a long, luxurious diversion. The artist Marclay (and researchers) spent three years amassing clips from film and TV to create a 24-hour looped video that represents every minute of all 24 hours, unfolding in real time, essentially functioning as an actual clock.