Antarctica grows underwater icicles that freeze the seafloor. 🧊

Antarctica grows underwater icicles that freeze the seafloor. 🧊 . . . In 2011, Hugh Miller and Doug Anderson filmed a brinicle descending beneath Antarctic sea ice at a depth of about 20 meters. The super-cold brine froze seawater around itself, then spread across the bottom for hours. Sea stars and urchins too slow to escape were sealed into its icy path.