Cities - Surviving the Urban Jungle • episode "S1E8" • Human Planet

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

12:43

Rip currents can appear without warning, turning an ideal beach outing into a horrific scene of chaos and panic. But groundbreaking new research could teach thousands of potential victims how to spot and escape these silent killers before it's too late.

Breakthrough • 2019 • Environment

41:59

There are twice as many rogue planets as stars in the galaxy. So what might happen if a ringed planet the size of Neptune were on a collision course with Earth?

S1E3 • Doomsday: 10 Ways the World Will End • 2016 • Environment

58:18

Dr Helen Czerski delves into the Horizon archive to chart the transformation of a little-known theory into one of the greatest scientific undertakings in history.

Horizon • Environment

58:55

Last century, earthquakes killed over one million, and it is predicted that this century might see ten times as many deaths. Yet when an earthquake strikes, it always takes people by surprise. So why hasn't science worked out how to predict when and where the next big quake is going to happen? This is the story of the men and women who chase earthquakes and try to understand this mysterious force of nature. Journeying to China's Sichuan Province, which still lies devastated by the earthquake that struck in May 2008, as well as the notorious San Andreas Fault in California, Horizon asks why science has so far fallen short of answering this fundamental question.

Horizon • 2009 • Environment

31:28

Graham discovers a fascinating pattern that may connect the spectacular megalithic temples of Malta, which he believes to be much older than reported.

S1E3 • Ancient Apocalypse • 2022 • Environment