Stunning Drone Footage From Beneath The Ice Of Antarctica

Scientists use a range of techniques—from satellite observations to drilling holes—to measure sea ice thickness. Usually, such efforts look down at the sea floor. But, by equipping an underwater drone with upward-looking sonar, researchers were able to create the first high-resolution 3D maps of Antarctic sea ice. » 11/25/14 2:40pm 11/25/14 2:40pm