The world's largest floating object, iceberg A23a, is soon to break apart after having been stuck at sea for decades. The iceberg originally broke a part from Antarctica in 1986 and is now drifting near South Georgia Island. "Only recently did it come ungrounded and begin to drift northward," said Ted Scambos, an ice scientist from the University of Colorado. "Right now, the iceberg is breaking apart into big pieces." Scambos describes what the upcoming summer months in the Southern Hemisphere w

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PBS News Hour West live episode, Oct. 3, 2025