A ‘polynya’ is a large ice-free area that develops in an otherwise frozen sea, and this particular formation is situated in the Weddell Sea, east of the Antarctic Peninsula. At its peak ...

But this polynya's reappearance is a mystery to scientists ... A mysterious hole larger than Maryland has reappeared in the middle of Antarctica after 42 years. Scientists aren't sure how it ...

Sea ice surrounding the continent expands outward, effectively doubling Antarctica's size. But during the winters of 2016 and ...