Drone submarine finds mysterious 1,300-ft-long structures under Antarctic ice Interesting EngineeringUnderwater Robot Reveals ‘Enigmatic’ Shapes on the Bottom of Antarctic Ice The New York TimesNever-before-seen shapes up to 1,300 feet long discovered beneath Antarctic ice Livescience.comUnderwater mapping reveals new insights into melting of Antarctica’s ice shelves Phys.orgFirst map of an ice shelf’s bottom reveals mysterious melt patterns Nature.com