Judi Dench: My Passion For Trees • 2017

44:54

The Alps are known as the majestic mountain range of Europe. But their formation from a collision between Europe and Africa left an unstable structure that is now a classic study in erosion by rivers of water, ice and rock suggesting an even greater former glory. Left unexplained is why the Mediterranean Sea exists between the continents.

S1E13 • How the Earth Was Made • 2009 • Environment

49:05

We are all seeing rather less of the Sun. Scientists looking at five decades of sunlight measurements have reached the disturbing conclusion that the amount of solar energy reaching the Earth's surface has been gradually falling. Paradoxically, the decline in sunlight may mean that global warming is a far greater threat to society than previously thought.

Environment

51:00

When you soar above Yellowstone, it's easy to see why it became the world's first national park in 1872. It's a place of staggering beauty and fragile creatures, of stunning granite peaks that pierce the sky and colorful springs that may hold secrets about the origins of life. This aerial voyage takes you over high elevation lakes, snaking canyons, sputtering hot geysers, and snow-covered landscapes. Explore Yellowstone's history of Native Americans, European explorers, and 10 million years of tectonic upheaval.

2018 • Environment

41:57

When a gamma ray burst from two colliding stars hits the atmosphere, the deadly radiation delivers agonizing death and immediately wipes out half the planet. How will the last remaining humans survive?

S1E7 • Doomsday: 10 Ways the World Will End • 2016 • Environment

58:45

Travelling from Hawaii to the Amazon and Ethiopia and then on to the Mediterranean, Iain tells the story of the oceans – fierce waves, huge tidal bores, global currents and the future dangers of global warming.

S1E4 • Earth: The Power of the Planet • Environment

58:58

Witness the birth, growth and death of an island in the greatest ocean on Earth.

S1E4 • South Pacific • Environment