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PBS News Hour

Visiting the 'doomsday glacier' that’s melting away

The Thwaites Glacier is the largest, most menacing source of rising sea levels all over the world, and it is melting at an alarming rate. For years, scientists have warily watched it from afar, but in November, a team set out on a perilous journey to investigate what is happening below. Science correspondent Miles O’Brien reports on what they discovered.

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November 23, 2025 - PBS News Weekend full episode
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November 23, 2025 - PBS News Weekend full episode
November 22, 2025 - PBS News Weekend full episode
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November 21, 2025 - PBS News Hour full episode
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November 21, 2025 - PBS News Hour full episode
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November 20, 2025 - PBS News Hour full episode
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November 19, 2025 - PBS News Hour full episode
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November 18, 2025 - PBS News Hour full episode
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November 17, 2025 - PBS News Hour full episode
November 16, 2025 - PBS News Weekend full episode
26:31
November 16, 2025 - PBS News Weekend full episode
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November 15, 2025 - PBS News Weekend full episode
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November 14, 2025 - PBS News Hour full episode
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November 13, 2025 - PBS News Hour full episode
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November 12, 2025 - PBS News Hour full episode
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