Planetary scientist Carolyn Porco explains what it takes to look for life beyond Earth, and what conditions are required for life to exist. Porco argues that Saturn’s moon Enceladus—with its plumes of water vapor spewing into space, confirmed organic materials, and evidence of hydrothermal vents at the bottom of its liquid ocean—is the most promising place to look. Could Enceladus be the key to proving once and for all that life is not unique to Earth? What would it mean—both scientifically and spiritually—if we found evidence of a true second genesis right here in our own galactic back yard?

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

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

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

A new age of space exploration, and exploitation, is dawning. But surprisingly, some of the boldest ...

Horizon visits state-of-the-art laboratories and uses CGI to recreate the science-fiction-worthy wea...

NASA may have just gotten one step closer to the answering the question: are we alone? The Spitzer T...

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

NASA's biggest spacecraft, Cassini, plunges into Saturn in the final act of a 20-year mission showca...

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...

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

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

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

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

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

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

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

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

214 million years ago a gigantic meteorite broke up and impacted Earth. 65 million years ago, the im...

In a studio setting, Stephen Hawking, Arthur C. Clarke and Carl Sagan (who joins them via satellite)...