Leave your feedback Share Copy URL https://www.pbs.org/newshour/show/moguls-2 Email Facebook Twitter LinkedIn Pinterest Tumblr Share on Facebook Share on Twitter Story A time-lapse video showing the uphill migration of ski moguls on the Riflesight Notch ski run at Winter Park Ski Resort, Colorado, USA. Each frame of the movie is one day, and the movie lasts five months, starting in early December and ending in late April. Each movie is brief, lasting only a couple of seconds to span the entire 2005 to 2006 ski season. Video by David Bahr.