Discovery Classics

Robin Williams, who's experienced both the highs and lows of substance abuse, hosts a groundbreaking TV experiment. 4 heavy users on 4 of America's most abused drugs perform a series of physical tests to show exactly how drugs work.

"Are We Alone?" An eye-popping journey from the moons of Jupiter to a galaxy perhaps not so far, far away in search of alien life. We'll see what aliens might look like, question what it means to be alive, and calculate the odds of making 'contact'.

A fire kills three beloved astronauts. NASA rebounds, launching men into deep space and landing Neil Armstrong and Buzz Aldrin on the moon. Featuring newly re-mastered film from NASA's vault and told by the astronauts and engineers who were there.

4.56 billion years ago, a planet the size of Mars collided with our Earth. It set off a chain of events that would transform the Earth from a lifeless wasteland into the fertile, blue planet we know today. This is that story.

In Atlas: Australia, step into the world's oldest culture, drive the world's biggest trucks and join a cattle roundup on the world's largest ranch. Atlas: Australia is an epic adventure with intimate insight into this big, bold and tenacious country.