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

In 1955, a family of seven in Kentucky fired their guns on an alleged alien attack. But what did they really see.

What would happen if all humans vanished? Would LA's palm trees spark a huge inferno? What would become of New York? And which animals would take control from man.

Learn about the hunting of Jack the Ripper from space, the battle of the big guns in the land of the Bible, the clash of the mega-beasts, and a visitation from another galaxy.

After the Cuban revolution, Fidel Castro looked to exert his influence in Venezuela. Is Cuba still in charge of Venezuela's future.

Naval battles aren't always the dogfights of popular imagination. Sometimes, the real fight relied on secrets and subterfuge.

An acorn-shaped crash, a craft in Japan and a baffling impact in Britain - could these strange events prove Earth has been visited.

Explore 10 astonishing, unexplained technologies: from golden orbs in Mexico to a sacred box said to speak with the heavens.

Experts investigate why so many UFO sightings take place in Los Angeles, determining that the answer may lie underwater.

Dan explores the history of York's castle, from the Viking Jorvik and the Normans, to the dark days of the anti-Jewish pogrom and the imprisonment of the Knights Templar. (3 of.

Hugh and the team go on the hunt for the Morda Workhouse in Oswestry, to find out what the conditions were really like for those who lived there.

In 1955, a family of seven in Kentucky fired their guns on an alleged alien attack. But what did they really see.

What would happen if all humans vanished? Would LA's palm trees spark a huge inferno? What would become of New York? And which animals would take control from man.

Learn about the hunting of Jack the Ripper from space, the battle of the big guns in the land of the Bible, the clash of the mega-beasts, and a visitation from another galaxy.

After the Cuban revolution, Fidel Castro looked to exert his influence in Venezuela. Is Cuba still in charge of Venezuela's future.

Naval battles aren't always the dogfights of popular imagination. Sometimes, the real fight relied on secrets and subterfuge.

In the Swiss Alps, a Roman dagger discovery reveals a 2,000-year-old battlefield where the Suanetes tribe fell to the Roman Empire.

As the Roman Empire expands its reaches into what is now Germany, its legions are faced with ferocious Germanic tribesmen.

An acorn-shaped crash, a craft in Japan and a baffling impact in Britain - could these strange events prove Earth has been visited.