For more than 40 years, glaciologist Mauri Pelto has been measuring the shrinking glaciers in the rugged North Cascade Mountains of Washington State. He's been joined by his daughter, artist-scientist Jill Pelto, whose watercolors provide another view of the drastically-changing landscape, as the effects of human-caused climate change on glaciers becomes even more starkly apparent. Correspondent Ben Tracy reports. [Produced in partnership with Climate Central.]