A decrease in pressure ridges over the past 3 decades is making the ice more uniform, with unclear consequences.

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To our amazement, they seem to have called for back-up, and as four more pack ice killer whales appear ... We wait, watching for the thrill of a dorsal fin breaking the dark water.

Though the sea ice pack around the South Pole had steadily expanded up until 2015, its area suddenly plummeted in 2016. The scale of the Antarctic sea ice reached a record low in 2023. The ...