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.

The film features amazing scenes of places never before seen gathered by key space missions that cul...

National Geographic and NASA are sending you into space - live! For the first time ever, board the I...

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

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

A fresh perspective on a modern-day miracle that many of us take for granted: flying. Narrated by Ha...

William Shatner presents a light-hearted look at how the "Star Trek" TV series have influenced and i...

For over three decades, NASA and an international team of scientists and engineers pushed the limits...

This feature-length documentary is a portrait of eclipse chasers, people for whom solar eclipses - a...

Before the joint NASA/ESA Cassini-Huygens mission, humanity only knew what had been learned, decades...

An epic journey around Mars — built from real satellite and rover data — revealing the red planet as...
Comets pose one of the greatest threats to life on Earth - a threat that can only be countered if we...

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

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

Some 220 miles above Earth lies the International Space Station, a one-of-a-kind outer space laborat...

Told through the tales of love of a retiring film projectionist and a late-blooming actress, the sho...

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

Everyone knows Neil Armstrong came back from the Moon in 1969 – but it wasn’t until three years late...

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

An intimate portrait of life in Green Bank, West Virginia, home to the world's most sensitive radio ...