Creatures living among the hydrothermal vents burbling under the Arctic Ocean's ice layer have been historically difficult to study, but an underwater vehicle, the Nereid Under Ice, can get close to the vents to peek in at the animals and their homes without disturbing their environment with icebreaking ships.  Scientific American caught up with Woods Hole Oceanographic Institution senior scientist, Chris German, on the R/V Neil Armstrong to discuss how studying these Arctic dwellers could shape our understanding of how life evolved.