Our home planet has some extreme environments – and studying those places can help us in the search for extraterrestrial life. Our new documentary series, Our Alien Earth, follows NASA scientists into the field as they explore the Icelandic lava fields, the wilderness of Greenland, and underwater volcanoes off the coast of Santorini, Greece. There, they test technologies that directly inform NASA missions to detect and discover extraterrestrial life in the universe. Episode 3, available now on NASA+, takes us to those Greek undersea volcanoes with Dr. Richard Camilli, his team, and a suite of autonomous underwater vehicles. The team hopes to give their robotic explorers the same scientific reasoning of a human astrobiologist, helping us characterize alien oceans and remotely search for signs of life on distant ocean worlds. Credit: NASA/Mike Toillion #NASA #Earth #Explore #Santorini #Volcano #Robots #Astrobiology