Remarkable time-lapse footage by James Balog, one of the worlds foremost nature photographers, reveals massive glaciers and ice sheets splitting apart, collapsing, and disappearing at a rate that has more and more scientists alarmed. NOVA investigates this latest evidence of a radically warming planet on Extreme Ice, a NOVA National Geographic Television special, premiering Tuesday, March 24 at 8pm ET/PT on PBS (check local listings).

To learn more please check us out online at http://www.pbs.org/wgbh/nova/extremeice/