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Archaeologists identify a site containing unknown structures. A lake full of jellyfish is studied and Argentinian researchers make a discovery.

When terrorists kidnap more than 200 schoolgirls in northern Nigeria, rescuers use satellites to track them down.

Hitler's niece committed suicide. However, it's not known if she died at her own hands, or a victim of Hitler's overbearing affections.

In 1923, Adolf Hitler led the infamous Beer Hall Putsch, an attempt to take power in Germany by force. It was a day that would change the world forever, birthing Hitler's regime.

Historic accounts of animalist gods from around the world, including insectoid and reptilian deities.

Ancient alien theorists explore the mysterious phenomena of the Nazca Lines. Could these huge geoglyphs in Southern Peru have an extraterrestrial connection.

Viking Camp and Iron Age Gold: Dr Alice Roberts explores the most exciting finds from West Britain. Iron Age gold in Britain is unearthed and a Viking camp is discovered.

Alice Roberts shares archaeological discoveries from the west of the UK, including a Roman bath house and a German camp. (2 of.

The Titanic sank with a terrible death toll in 1912, but World War I soon overshadowed the tragedy. Decades later, two men strive to rediscover the ship's memory.

Archaeologists identify a site containing unknown structures. A lake full of jellyfish is studied and Argentinian researchers make a discovery.

When terrorists kidnap more than 200 schoolgirls in northern Nigeria, rescuers use satellites to track them down.

Hitler's niece committed suicide. However, it's not known if she died at her own hands, or a victim of Hitler's overbearing affections.

In 1923, Adolf Hitler led the infamous Beer Hall Putsch, an attempt to take power in Germany by force. It was a day that would change the world forever, birthing Hitler's regime.

Exploding Whale, Alligator Attack, Dallas Airshow Disaster and Ski Lift Mayhem: Tony Harris breaks down the most shocking moments ever caught on camera.

Jeff MacKinnon searches the Death Coast for Le Chameau, an 18th-century shipwreck carrying a fortune in rare coins.

Historic accounts of animalist gods from around the world, including insectoid and reptilian deities.