The lava fields of Hawaii. The peaks of the Himalayas. The crowds of a Justin Bieber concert. These are among the most perilous of environments on planet Earth, places where few humans dare tread. They ain’t got nothin’, though, on waters of our planet’s polar regions, where frigid temperatures and considerable pressures would snuff a puny human like you in a heartbeat. Robots, though? This is the stuff their tough-as-hell bodies were made for.