Without the moon, humans wouldn't exist. Life, if it had started at all, would be in its earliest stages of evolution. Days would last four hours, winds would blow at hurricane force and there would be a dense and toxic atmosphere resembling that of Venus. Around 50 million years after the formation of the solar system, a Mars-sized planet called Theia hit the newly formed Proto-Earth. The blast sent planetary material from the pair into orbit around earth which eventually formed the Moon. In this one-hour special, viewers learn what Earth was like before the moon creating impact, and what Earth would have been like if the moon had never existed.

A documentary on Al Gore's campaign to make the issue of global warming a recognized problem worldwi...

A documentary chronicling the history of the telescope from the time of Galileo. Featuring interview...

Join our host on the International Space Station of the year 2050. Marvel at the three-dimensional s...

The first American space station Skylab is found in pieces scattered in Western Australia. Putting t...

Travel alongside the astronauts as they deploy and repair the Hubble Space Telescope, soar above Ven...

From the unique vantage point of 200 miles above Earth's surface, we see how natural forces - volcan...

The 1960s was an extraordinary time for the United States. Unburdened by post-war reparations, Ameri...

In the year 1957 the cold war expands to space. The Soviet-Union sends Sputnik as the first manmade ...

In one single, epic camera move we journey from Earth's surface to the outermost reaches of the univ...

Roddy McDowall takes you, film by film, from production meetings to make-up sessions, then right ont...

A journey into four classical elements through the four main characters of the film. The main charac...

Archival material from the original NASA film footage – much of it seen for the first time – plus in...

In unusual circumstances, scientists from different countries work together to achieve a common scie...

A feature-length documentary about the film Galaxy Quest and its legacy, celebrating its milestone 2...

Top Gear presenter James May presents this informative program that examines the historic moon missi...

The Wonder of it All focuses on the human side of the men behind the Apollo missions through candid ...

Global warming in context. What the climate of the past tells us about the climate of the future.

Join the Mars rovers Spirit and Opportunity for an awe-inspiring journey to the surface of the myste...

An astonishing journey revealing the awesome power of the natural world. Over the course of one sing...
Comets pose one of the greatest threats to life on Earth - a threat that can only be countered if we...