Antarctic Extremes | Exploring Antarctica's Threatened Glaciers (with a Robot) | Episode 5 | PBS

Researchers hope they can better understand how climate change is affecting Antarctica’s vulnerable glaciers. Caitlin and Arlo meet with scientists & engineers at the 8-mile-long Erebus Glacier Tongue to discover how a 12-foot-long robot named Icefin might help save the world. Then, they head to the Florida-sized Thwaites glacier on the West Antarctic Ice Sheet - the front line of climate change.