Sky History 2 HD Tuesday

Experts investigate stories of a French church that supposedly contains a gateway to another universe and an alien library believed to be hidden underneath the Great Sphinx of Giza

Experts investigate whether common human rituals may have been inspired by contact with aliens

Archaeologists find an ancient structure built on granite columns, puzzling stone spheres are found in Costa Rica and Mexican skeletal remains emerge

The German attack on Warsaw in September 1939. Withing a week, much of the Polish capital was in ruins

Visits to the most dangerous hotel on the planet, the world's most fascinating beaches, a used car market in Benin and a diamond mine in Russia

Experts investigate stories of a French church that supposedly contains a gateway to another universe and an alien library believed to be hidden underneath the Great Sphinx of Giza

Experts investigate whether common human rituals may have been inspired by contact with aliens

The most stunning relic in Hamilton and Carl's collection - the black obsidian chalice - is examined. The pair then head to Portugal to hunt for clues about the chalice

The presenter is joined by Bruno Tonioli to look at key battle tactics during the Roman Invasion - such as the complexity of firing a catapult

The rise and fall of the great Christian empires of Byzantium, the Crusaders and the Venetians through 10 sites, including St Mark's Basilica in Venice

The German attack on Warsaw in September 1939. Withing a week, much of the Polish capital was in ruins

Troy, alongside trusted confidant Pickle Wheat and seasoned hunter Don Brewer, embarks on a quest to uncover a legendary treasure hidden deep within the bayou

Exploring a mysterious forest in Poland and amazing underground locations around the world. Plus, a Chinese railway that runs through residential buildings

Examining the 10 most disturbing extraterrestrial encounters ever, from mass sightings in the sky to reports of alien probes found in human bodies

Investigating whether aliens could be plotting an attack on Earth, and if humans could survive their weapons' terrifying capabilities

Al takes a look at colonial rule in Jamaica, with Chris Daley helping him uncover the real story of the pirates of the Caribbean and the barbaric realities of the slave trade

Ancient Egyptian queens who have shaped history, featuring an assessment of their enduring legacies. This programme looks at the life of Queen Tiye

Archaeologists find an ancient structure built on granite columns, puzzling stone spheres are found in Costa Rica and Mexican skeletal remains emerge

Tensions rise between Henry Jennings and Benjamin Hornigold who declares Nassau a pirate republic. Dramatised documentary, narrated by Derek Jacobi

Experts investigate stories of a French church that supposedly contains a gateway to another universe and an alien library believed to be hidden underneath the Great Sphinx of Giza

Experts investigate whether common human rituals may have been inspired by contact with aliens

The presenter is joined by Bruno Tonioli to look at key battle tactics during the Roman Invasion - such as the complexity of firing a catapult

An examination of 10 sites that chart the rise of the crusading Catholic empire of Spain, beginning in the walled and highly religious medieval city of Avilla

Examining the 10 most disturbing extraterrestrial encounters ever, from mass sightings in the sky to reports of alien probes found in human bodies

Investigating whether aliens could be plotting an attack on Earth, and if humans could survive their weapons' terrifying capabilities

Troy, alongside trusted confidant Pickle Wheat and seasoned hunter Don Brewer, embarks on a quest to uncover a legendary treasure hidden deep within the bayou

Experts visit an ancient fortress in Peru believed to have been built by aliens using tools far more advanced than those thought to have been available to humans at the time