Watch Our Alien Earth on NASA+: https://plus.nasa.gov/series/our-alien-earth/ Soar above the Great Sand Dunes of Alaska's Kobuk Valley with Dr. Cynthia Dinwiddie and her team as they use ground-penetrating radar and other techniques to map the subsurface environment. If microbial life could live beneath the sand on Earth, could similar life survive the conditions of Mars, and Saturn's moon, Titan? Our Alien Earth: The Great Sand Dunes of Kobuk Valley, Alaska NASA+ Documentary Series, Episode 5 Shot, Edited, & Directed by Mike Toillion / NASA Coming to NASA+ Spring 2026. In this NASA+ documentary series, follow NASA scientists into the field as they explore the most extreme environments on Earth, testing technologies that directly inform NASA missions to detect and discover extraterrestrial life in the universe. https://science.nasa.gov/astrobiology/multimedia/our-alien-earth/