Look Around You

Potentially catastrophic threats to human existence are examined.

The Earth's continents are instantly recognizable. These iconic landmasses seem permanent and unchanging, yet they are merely the wreckage of a much larger long-lost supercontinent – Pangaea. In this stunning four part series Professor Iain Stewart uncovers the evidence for this ancient past. He reveals how the world around us is full of clues – in the rocks, the landscapes and even the animals. All of which tell us how the land we live on was created.

A look at massive machinery used to build a hydroelectric power plant in Iceland's eastern highlands. Included: a tunnel-boring machine called Jaws; a multiarmed rig.

Darwin's findings are examined via the work of evolutionary biologist, Armand Marie Leroi.

James May gives a straightforward guide to some of science's big ideas, explaining everything from evolution and Einstein to engineering and chemistry.

Recalling the story of the Sputnik I satellite, launched by the Soviet Union in October 1957. Featured: an assessment of its impact, which includes the formation of NASA; its influence on consumer technologies, such as the Internet and cell phones. Liev Schreiber narrates.