Science Channel HD

Don explores the race to the moon between the U.S. and the Soviet Union; he straps into a human centrifuge, meets an astronaut who actually went there and learns just how close America came to losing.

Following the inside story of NASA engineers as they race to build and launch the rocket, Artemis I, as it prepares for missions that will transport humans to the moon, then launch a journey to Mars and beyond.

Dark Matter is thought to be the cosmic glue that holds the universe together, yet the search for it continues to eluded scientists today.

With more than 80 moons, Saturn could rank among the most dynamic planetary system in Sol's neighborhood; with its giant underground oceans and protective magnetic fields, experts explore how Saturn's moons offer new insight into the Solar System.

The legends of robot combat put it all on the line for a shot at the 2018 World Championship.

Fan favorites Yeti and Witch Doctor face off in a world-class fight as top competitors battle to earn their spots in the postseason tournament.

Astronaut Leroy Chiao's spacewalk is interrupted by bright lights flying past; a flying saucer is photographed from the Apollo.

Gravitational waves are helping scientists explore the cosmos in revolutionary, new ways, and the discoveries they make are revealing the universe's greatest mysteries.

The galaxy is full of stars ready to explode into supernovas, a stellar detonation powerful enough to destroy all life on Earth; it's an event that hasn't occurred in 400 years, and the search is on to locate which star may be next.

Exploring new discoveries that rewrite the history of the solar system, revealing a complex and violent story that begins with the birth of the sun from the debris of a massive galactic collision to its eventual fate as a lone zombie star.

Victor Vescovo's team searches for the deepest point of the Atlantic Ocean.

Victor Vescovo's team searches for the deepest point of the Southern Ocean.

Victor Vescovo and his team head to the Indian Ocean.

Victor Vescovo's team takes on the Mariana Trench in the Pacific Ocean.

Victor Vescovo's team concludes its mission in the Arctic Ocean.

Mary Magdalene, a key figure in Christianity, traveled with Jesus and is said to have witnessed his crucifixion and resurrection.

Templar fact and fiction have become blurred by their depictions in book and on film. This program presents a very different picture that challenges head on the orthodox beliefs about an order that angered much of Europe - particularly France.

Jamie Theakston investigates Johann Reichhart, a German executioner who killed approximately 3,000 people during World War II.

Mystery still surrounds how fascist dictator Benito Mussolini met his end, before being hanged.

The Vatican Secret Archives is a treasure trove of history that is shrouded in secrecy; Jamie Theakston heads to Rome in a bid to gain access.

The extraordinary story of the Bulgarian secret department called Service 7, a force that operated in 9 countries.

Mystery still surrounds how fascist dictator Benito Mussolini met his end, before being hanged.