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Hitler appears to be eliminated after his failed putsch in 1923. Discover how the Nazi movement used democracy's tolerance in Germany to come back.

The Mutual UFO Network is devoted to the scientific investigation of UFOs. With more than five decades of investigations, MUFON's database could contain proof.

Meteor impacts have created the perfect environment for humankind. Could new evidence reveal that celestial objects have been sent by an alien intelligence.

Revelation is the most terrifying book in the Bible, describing mankind's final days. But who will survive God's wrath? And when will it happen.

In 1994, a secret manuscript hidden in the Vatican revealed a previously unknown apocalyptic prophecy accredited to Nostradamus. Where did it come from.

The defeat at Stalingrad in 1943 was the turning point of the war and convinced the Nazi leadership to intensify their terror and propaganda campaigns.

The Pyramid Tool Kit, the Killer Foot Machine and the Lost Head: Examine an ancient pyramid toolkit, a device that unleashes lethal X-rays and a divisive terracotta sculpture.

One of the world's most popular cathedrals, Notre Dame suffered a devastating fire in 2019 - but how is it surviving today.

Close Encounters of the Fifth Kind: Explore whether contact with extraterrestrial life could have occurred. If so, has this happened in the highest levels of the US government.

The vast Alaskan wilderness is known for disappearances, stories of strange creatures and UFO sightings. Could this be due to an otherworldly presence.

The F15 Eagle immediately turned the tide of the first Gulf War to prove its greatness.

The mighty North American twin delivered the first blow in the fight back against Japan, in one of the most daring and audacious raids of all time.

Dr Alice Roberts explores the biggest collection of Roman writing tablets. A fort scattered with human skulls provides evidence of Caesar's invasion.

In the East of Britain, Dr Alice Roberts finds new revelations from 'Britain's Pompeii' and the theatre where Shakespeare premiered Romeo and Juliet.

Dr Alice Roberts explores finds from the west of Britain, including the lost World War I training trenches on Salisbury Plain.

Discover over a hundred massive concrete arrows scattered across America, a mysterious hole in the middle of a lake in Southern California and more.

Close Encounters of the Fifth Kind: Explore whether contact with extraterrestrial life could have occurred. If so, has this happened in the highest levels of the US government.

The vast Alaskan wilderness is known for disappearances, stories of strange creatures and UFO sightings. Could this be due to an otherworldly presence.

Discover what would happen to priceless artefacts such as the Mona Lisa, the Declaration of Independence and the Liberty Bell if humans were no longer around.

With no humans around, discover the fate of Las Vegas and Atlantic City, where the ocean would tear apart casinos and a new rat pack would take over.

Discover the fate of mankind's machinery of war in a world with no people, in which Pearl Harbor comes under renewed attacks, and snow causes urban avalanches.

Explore a collection of figures and groups who have redefined the notion of fame through history, from royal families across the globe to Marilyn Monroe and The Beatles.

The Real Evidence: Delve into the new theories that shed light - or cast doubt - on the Crucifixion. Is there any real archaeological evidence.

With the invasion of Britain officially postponed, the Germans looked for another way to knock Britain out of the war.

In 1941, Japan, the Axis ally of Germany and Italy, attacked the US naval base at Pearl Harbour, Hawaii, with no warning and no declaration of war.

Close Encounters of the Fifth Kind: Explore whether contact with extraterrestrial life could have occurred. If so, has this happened in the highest levels of the US government.