In the segment, “Paths of Life,” WaveLengths begins with Sustaining Life, which presents a visual primer for the multi-billion project iPlant, which involves some of the most advanced life scientists and researchers in the world. . Next is a visit to the exotic Galapagos Islands, the place that triggered Darwin’s discoveries on natural selection, and see how much they have changed since Darwin first saw them in 1831. This is followed by a segment on “un-natural” revolution; a result of the Glen Canyon Dam, built in 1966 on the Colorado River to provide electricity for the region’ s growing population. Dramatic findings from one scientist who has been monitoring the river since the dam first began operating will be presented. Lastly, around 2020, NASA is planning a mission, costing several billion dollars, for the far reaches of the solar system to look for signs for life. Find out which moon NASA has decided to shoot for and why.