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How Climate Has Shifted Over Millions of Years

A lake in the Arctic has a lot to say about our planet's fluctuating temperatures over the last 34 million years. Play NOVA's Polar Lab to see how.
Clip Season 47 Episode 1 Length 02:44 Premiere: 02/05/20

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Season 47 Episodes

Human Nature
S47 E11 Length 1:33:41 Premiere Date 09/09/20

Eagle Power
S47 E7 Length 53:22 Premiere Date 05/20/20

Cat Tales
S47 E3 Length 53:21 Premiere Date 02/19/20

Dog Tales
S47 E2 Length 53:21 Premiere Date 02/12/20

Polar Extremes
S47 E1 Length 1:52:46 Premiere Date 02/05/20

Polar Extremes Preview
Preview Length 03:19 Premiere Date 02/05/20

What if Carbon Left Your Tailpipe as Solid Chunks?
Clip Length 02:12 Premiere Date 02/05/20

Plant Fossils Hint at Arctic's Swampy Past
Clip Length 03:02 Premiere Date 02/05/20

What did the East Coast Look Like 3 Million Years Ago?
Clip Length 03:21 Premiere Date 02/05/20

How Carbon Dioxide Warms Planet Earth
Clip Length 02:32 Premiere Date 02/05/20

A Bird's-Eye View of Carbon Emissions
Clip Length 01:56 Premiere Date 02/05/20

This Alaska Community is Losing Sea Ice to Climate Change
Clip Length 04:47 Premiere Date 02/05/20

Fifty Million Years Ago, the Arctic Was a Warm Swamp
Clip Length 02:07 Premiere Date 02/05/20

What’s Causing Greenland’s Biggest Glacier to Melt?
Clip Length 02:04 Premiere Date 02/05/20

How Earth’s Climate Changed Over the Past 500 Million Years
Clip Length 03:25 Premiere Date 02/05/20

This Canadian Cave Has Been Frozen Since the Last Ice Age
Clip Length 03:11 Premiere Date 02/05/20

How Climate Has Shifted Over Millions of Years
Clip Length 02:44 Premiere Date 02/05/20

Why Trees Are Living Climate Records
Clip Length 01:29 Premiere Date 02/03/20

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Making North America: Origins - S42 E20

Premiered On: 11/04/2015

Discover how forces of almost unimaginable power gave birth to the continent of North America.

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Weathering the Future - S50 E5

As extreme weather in the U.S. impacts more people - with longer heat waves, more intense rainstorms, megafires, and droughts - discover how Americans are fighting back by marshaling ancient wisdom and innovating new solutions.

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Making North America: Life - S42 E21

Premiered On: 11/11/2015

The mysteries of how life evolved in North America, including the arrival of humans, are explored.

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Making North America: Human - S42 E22

Premiered On: 11/18/2015

From Ice Age to oil boom, discover the challenges faced and the wealth uncovered as humans take over the continent.

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Why Bridges Collapse - S46 E18

Premiered On: 10/16/2019

NOVA investigates what may have led to the collapse of the Polcevera Bridge in Genoa, Italy, that killed 43 people. But the Polcevera Bridge isn't alone. Join experts as they compare what happened to the Polcevera with other deadly bridge collapses, including Minnesota's I-35W bridge over the Mississippi and the famed Silver Bridge over the Ohio River.

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Secrets in Your Data - S51 E7

Alok Patel takes a look at what happens to the personal data shared on social media and efforts to maximize benefits without compromising personal privacy.

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Making North America: Origins - S42 E20

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Ancient Maya Metropolis - S48 E22

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Secrets of the Forbidden City - S44 E15

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Great American Eclipse - S51 E6

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A.I. Revolution - S51 E5

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Why Bridges Collapse - S46 E18

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Polar Extremes - S47 E1

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Hidden Volcano Abyss - S50 E8

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