How Explosives, a Robot, and a Sled Expose a Doomsday Glacier

How Explosives, a Robot, and a Sled Expose a Doomsday Glacier

Behind her, she dragged a sled loaded with a ground-penetrating radar, which fired pulses through a thousand feet of ice and analyzed the radio waves that bounced off the seawater below, thus building a detailed image of the glacier beneath her feet.Erin Pettit leaves camp with a ground-penetrating radar in tow.