Brinicle under ice sheet, McMurdo Sound, Antarctica. As the brinicle reaches the bottom a stream of supercooled ice flows and forms across the sea floor bringing an icy death to anything in its path. Frozen Planet

Brinicle under ice sheet, McMurdo Sound, Antarctica. As the brinicle reaches the bottom a stream of supercooled ice flows and forms across the sea floor bringing an icy death to anything in its path. Frozen Planet