Watch how a NASA sub could explore Titan's biggest methane sea

NASA has long announced that it wants to create a tough-as-nails submarine that can withstand extreme conditions, because it's going to explore the largest liquid methane/ethane sea on Saturn's biggest moon Titan. Now, the agency has released a concept video of the robotic submersible and also revealed more details about the potential mission at this year's Innovative Advanced Concepts (NIAC) Symposium. Despite being a natural satellite, Titan is pretty Earth-like with a dense atmosphere, and the agency likely wants to see if life once existed there or to look for clues on how life on Earth began. NASA envisions sending the unmanned vehicle on a 90-day mission exploring the depths of Titan's largest body of liquid ominously named Kraken Mare, collecting and analyzing samples the whole time.