Tom Roston reviews Jeff Orlowski's visually-striking Chasing Ice, a film about environmental photographer James Balog’s quest to document the melting of our ice caps through time lapse photography.

Any documentary filmmaker will tell you that getting a film into Sundance is a Herculean achievement in itself, but some also come away with an award. Check out a rundown of the 13 prizes given to documentaries at this year's festival.