The first effort to send human beings to the Moon coincides during Christmastime on Earth.

Tragedy struck when the Space Shuttle Challenger disintegrated just 73 seconds into flight. Hours earlier, engineers argued to cancel the launch, amid fears of such a tragedy – so why did it go ahead?

A respectful overview of Dr. Marvin E. Grunzke’s career that included training Ham, the first chimpanzee launched into orbit by NASA.

How an electric lineman's tool manufacturer in Centralia, Missouri, helped save the first American space station from catastrophe.

Host John Larroquette takes viewers on a nostalgic trip through the 1965-1968 sci-fi comedy series. The disc's rare footage include Guy Williams's screen test, extended clips from the 1965 pilot, bloopers and the original clips CBS network sales presentation.  Viewers also get to go behind the scenes of the 1998 big-screen version. To top it off, Billy Mumy (Will), Jonathan Harris (Dr. Smith) and the robot reunite for a special tribute.

Relive humankind's incredible accomplishment of walking on the moon in this program that presents highlights of Walter Cronkite and the CBS News Team's comprehensive coverage of the thrilling nine-day Apollo 11 mission. Then, Cronkite reports on the treacherous voyage of Apollo 13, as the brave crew struggles to regain control after an explosion rips through the ship hundreds of thousands of miles above Earth.

Black holes stand at the limit of what we can know. To explore that edge of knowledge, the Event Horizon Telescope links observatories across the world to simulate an earth-sized instrument. With this tool the team pursues the first-ever picture of a black hole, resulting in an image seen by billions of people in April 2019. Meanwhile, Hawking and his team attack the black hole paradox at the heart of theoretical physics—Do predictive laws still function, even in these massive distortions of space and time? Weaving them together is a third strand, philosophical and exploratory using expressive animation. “Edge” is about practicing science at the highest level, a film where observation, theory, and philosophy combine to grasp these most mysterious objects.

A documentary chronicling the history of the telescope from the time of Galileo. Featuring interviews with leading scientists discussing Galileo's first use of the telescope to the latest discoveries in cosmology.

Has man really been to the moon? It’s been 50 years, and the debate rages on. For the firs time, a film compiles in a single piece of work, all the best evidence in favor of the moon landings and the evidence contrary to them. For the first time we can also analyze the Apollo pictures in detail, with the aid of some among the top photographers in the world. What was the Apollo project really? The biggest achievement in the history of mankind, or the biggest fakery of all times, watched on live television by more than half a billion people?