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PBS News Hour

What is Liquefaction?

Hari asks Kirk Johnson, what is liquefaction, and how could it have snuffed out an entire population of ice age mastedons?
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February 23, 2026 - PBS News Hour full episode
57:46
Season 2026 Episode 42
February 23, 2026 - PBS News Hour full episode
February 23, 2026 - PBS News Hour full episode
February 20, 2026 - PBS News Hour full episode
57:46
Season 2026 Episode 41
February 20, 2026 - PBS News Hour full episode
February 20, 2026 - PBS News Hour full episode
February 19, 2026 - PBS News Hour full episode
57:46
Season 2026 Episode 40
February 19, 2026 - PBS News Hour full episode
February 19, 2026 - PBS News Hour full episode
February 18, 2026 - PBS News Hour full episode
57:46
Season 2026 Episode 39
February 18, 2026 - PBS News Hour full episode
February 18, 2026 - PBS News Hour full episode
February 17, 2026 - PBS News Hour full episode
57:46
Season 2026 Episode 38
February 17, 2026 - PBS News Hour full episode
February 17, 2026 - PBS News Hour full episode
February 16, 2026 - PBS News Hour full episode
57:46
Season 2026 Episode 37
February 16, 2026 - PBS News Hour full episode
February 16, 2026 - PBS News Hour full episode
February 13, 2026 - PBS News Hour full episode
57:46
Season 2026 Episode 36
February 13, 2026 - PBS News Hour full episode
February 13, 2026 - PBS News Hour full episode
February 12, 2026 - PBS News Hour full episode
57:46
Season 2026 Episode 35
February 12, 2026 - PBS News Hour full episode
February 12, 2026 - PBS News Hour full episode
February 11, 2026 - PBS News Hour full episode
57:46
Season 2026 Episode 34
February 11, 2026 - PBS News Hour full episode
February 11, 2026 - PBS News Hour full episode
February 10, 2026 - PBS News Hour full episode
57:46
Season 2026 Episode 33
February 10, 2026 - PBS News Hour full episode
February 10, 2026 - PBS News Hour full episode
February 9, 2026 - PBS News Hour full episode
56:45
Season 2026 Episode 32
February 9, 2026 - PBS News Hour full episode
February 9, 2026 - PBS News Hour full episode
February 6, 2026 - PBS News Hour full episode
57:46
Season 2026 Episode 31
February 6, 2026 - PBS News Hour full episode
February 6, 2026 - PBS News Hour full episode
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