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Aspiring teenage astronauts reveal that a journey to Mars is closer than you think.

National Geographic's riveting effort recounts all 12 crewed missions using only archival footage, photos and audio.

Professor Alice Roberts follows a decade-long historical quest to reveal a hidden secret of the famous bluestones of Stonehenge. Using cutting-edge research, a dedicated team of archaeologists led by Professor Mike Parker Pearson have painstakingly compiled evidence to fill in a 400-year gap in our knowledge of the bluestones, and to show that the original stones of Britain’s most iconic monument had a previous life. Alice joins Mike as they put together the final pieces of the puzzle, not just revealing where the stones came from, how they were moved from Wales to England or even who dragged them all the way, but also solving one of the toughest challenges that archaeologists face.

The captivating tales of the people and events behind one of humanity's greatest achievements in exploration: NASA's Voyager mission.

On July 16, 1969, hundreds of thousands of spectators and an army of reporters gathered at Cape Kennedy to witness one of the great spectacles of the century: the launch of Apollo 11. Over the next few days, the world watched on with wonder and rapture as humankind prepared for its "one giant leap" onto the moon--and into history. Witness this incredible day, presented through stunning, remastered footage and interviews that takes you behind-the-scenes and inside the spacecraft, Mission Control, and the homes of the astronaut's families.

A French documentary or, one might say more accurately, a mockumentary, by director William Karel which originally aired on Arte in 2002 with the title Opération Lune. The basic premise for the film is the theory that the television footage from the Apollo 11 Moon landing was faked and actually recorded in a studio by the CIA with help from director Stanley Kubrick.

Never-before-heard audio tapes recorded with Neil Armstrong during the final years of his life reveal an intimate portrait of this iconic - and famously private - man. Illustrated through previously unseen personal photographs and archival footage, this documentary special takes viewers on an emotional journey into the thoughts and experiences of the first man on the Moon.

Artificial Intelligence (AI) is possibly the most powerful technology of our time. It has the potential to solve humanity’s biggest challenges yet some fear AI will be our downfall. iHUMAN follows pioneers at the frontline of the race to develop the ever more sophisticated AI to find the questions we need to ask at this crucial point in history.

The recent discovery by the Kepler satellite of thousands of Earth-like planets where life could be possible, has given a big boost to the Search for Extraterrestrial Intelligence (SETI). In 2011, for the first time ever, Kepler provided us with a census of the Milky Way. We can now calculate how many stars in the Milky Way could have a planet like ours: around a billion.

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The Mandrin Cave in the Rhône Valley is a fascinating excavation site. Archaeologist Ludovic Slimak discovered fossils and flints here, proving that Neanderthals inhabited the cave for over 80,000 years. The first Neanderthal in France for half a century was also unearthed in the cave: He was given the name Thorin.