Watch the full episode on NASA+: https://plus.nasa.gov/series/our-alien-earth/ Delve deep beneath the volcanoes of Hawai’i with four teams of NASA astrobiologists as they investigate how life might survive in the subsurface of other worlds. Inside cavernous lava tubes, these scientists search for microbial life in volcanic rock, analyze subsurface gases, and build an augmented reality model of the field site – all to help advance NASA’s future exploration of Mars and beyond. Our Alien Earth: The Lava Tubes of Mauna Loa, Hawai’i NASA+ Documentary Series, Episode 4 Shot, Edited, & Directed by Mike Toillion / NASA https://plus.nasa.gov/video/our-alien-earth-the-lava-tubes-of-mauna-loa-hawaii/ 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/