Mountains - Life in Thin Air • episode "S1E5" • Human Planet

58:31

Surviving the bone-chilling cold, deadly blizzards and darkness of an Alaskan winter takes courage, cunning and remarkable endurance. In the raw beauty of windswept mountain peaks, icy tundra and snowbound forests, this is the story of the tough and resourceful characters that face up to the ultimate challenges of this untameable land.

S1E3 • Alaska: Earth's Frozen Kingdom • Environment

66:05

Craig Reucassel tackles one of our planet's biggest challenges: climate change, exploring where our energy comes from, health effects of transport and travel emissions plus the carbon footprint of what we eat.

S1E1 • Fight For Planet A: Our Climate Challenge • 2020 • Environment

59:00

Professor Chris Jackson charts the planet's changing climate. He shows how the oldest rocks and fossils provide evidence of radical climate changes throughout its history, revealing that what drives them is the amount of carbon dioxide in the atmosphere.

S1E1 • BBC Royal Institution Christmas Lectures - Planet Earth: A User's Guide • 2020 • Environment

44:54

The Great Lakes region provided geologists with much of the evidence for the frequent ice ages that visited North America. But the lakes may be a rather transient feature of the continent dependent upon the recurring ice ages to maintain their existence.

S1E7 • How the Earth Was Made • 2009 • Environment

53:16

NOVA follows a team of volcano sleuths as they embark on a worldwide hunt for an elusive volcanic mega-eruption that plunged the medieval earth into a deep freeze. The mystery begins when archaeologists find a hastily dug mass grave of 4,000 men, women, and children in London. At first they assume it's a plague pit from the Black Death, but when they date the bones, they're a century too early. So what killed off these families? The chronicles of that time describe a run of wild weather that devastated crops and spread famine across Europe. NOVA's expert team looks for the signature of a volcanic eruption big enough to have blasted a huge cloud of ash and sulfuric acid into the atmosphere, which chilled the entire planet. From Greenland to Antarctica, the team finds telltale "fingerprints" in ice and soil layers until, finally, they narrow down the culprit to a smoldering crater on a remote Indonesian island. Nearly 750 years ago, this volcano's colossal explosion shot a million tons of rock and ash into the atmosphere. Across the globe, it turned summer into winter. What would happen if another such cataclysm struck again today?

NOVA PBS • 2017 • Environment

53:32

As global temperatures rise, scientists are exploring solutions from planting trees to sucking carbon out of the air to geoengineering. But would they work? And what are the risks of engineering Earth's climate?

NOVA PBS • 2020 • Environment