Scientists want to make spelunking Mars possible. But the challenges are real: Even if engineers could make a robot that wouldn't get stuck on rocks, they would still have to figure out how to beam back data from the hole.
NASA teaching Boston Dynamic s robot dog Spot to explore caves on Mars as it looks for life dailymail.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from dailymail.co.uk Daily Mail and Mail on Sunday newspapers.