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PBS News Hour

How soil and squirrels offer cues on Alaska climate change

On the Alaskan tundra, researchers are tracking the march of global warming. Science correspondent Miles O’Brien explores how soil composition and the sleep schedules of squirrels might offer data on the ways warmer temperatures are affecting ecosystems.
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September 17, 2025 - PBS News Hour full episode
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Season 2025 Episode 260
September 17, 2025 - PBS News Hour full episode
September 17, 2025 - PBS News Hour full episode
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Season 2025 Episode 259
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Season 2025 Episode 258
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Season 2025 Episode 257
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Season 2025 Episode 256
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September 13, 2025 - PBS News Weekend full episode
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Season 2025 Episode 255
September 12, 2025 - PBS News Hour full episode
September 12, 2025 - PBS News Hour full episode
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Season 2025 Episode 254
September 11, 2025 - PBS News Hour full episode
September 11, 2025 - PBS News Hour full episode
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Season 2025 Episode 253
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September 10, 2025 - PBS News Hour full episode
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Season 2025 Episode 252
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Season 2025 Episode 251
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Season 2025 Episode 250
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Season 2025 Episode 249
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