Sky History 2 Tomorrow

Experts check out structures built to mirror the constellations, contemplating whether they may have been built as a message to send to extraterrestrials

Ever since the first atomic bomb went off in 1945, UFOs have been spotted at nuclear facilities across the world. Experts wonder if this presence could be a threat to mankind

Experts investigate an Italian mountain that has stood witness to inexplicable phenomena for centuries, wondering whether it could somehow be attracting alien visitors

Discovering how people used the skies to navigate and tell time, using breathtaking CGI and some of the most important astronomical artefacts

How extraordinary curiosities - once concealed within the planet's desert sands - are being finally brought to light by the elements themselves

Experts check out structures built to mirror the constellations, contemplating whether they may have been built as a message to send to extraterrestrials

Ever since the first atomic bomb went off in 1945, UFOs have been spotted at nuclear facilities across the world. Experts wonder if this presence could be a threat to mankind

Experts open previously off-limits secret files in a bid to answer some of the most mysterious questions surrounding UFOs and extraterrestrial life

A diamond with a sinister past, the bones of a world-famous bard, and a beach covered in 'cursed' stones

Strange descending lights spotted in 1980 at the now former RAF station at Woodbridge, Suffolk, by servicemen Jim Penniston, John Burroughs and Ed Casabang

In a Danish bog, hundreds of mutilated ancient bones are found, while a mysterious deserted island belonging to Russia is explored

At the sacrificial alter El Castillo, researchers find new evidence that could shed light on the Maya - a sacred well at Chichen Itza where thousands were deposited

Experts analyse the remains of two Viking boats, that were filled with dead bodies

Following the Cuban revolution, Fidel Castro looked to exert his influence in Venezuela. This programme assesses Cuba's residual part in Venezuela's future

An intriguing artefact in a museum in Southwark, south London. This strange brown felt object stands about eight inches high and is covered in 88 human teeth

Crews work around the clock to build the world's largest underwater concrete bed to salvage Italian cruise ship the Costa Concordia

Kevin Sempé explores the bay of Saint-Pierre in Martinique, where ships smouldered and sank following the devastating volcanic eruption of 1902

Billy focuses his attentions on the notorious Texas 7, a group of prisoners who escaped from the John B Connally Unit near Kenedy, Texas, in December 2000

Experts check out structures built to mirror the constellations, contemplating whether they may have been built as a message to send to extraterrestrials

Ever since the first atomic bomb went off in 1945, UFOs have been spotted at nuclear facilities across the world. Experts wonder if this presence could be a threat to mankind

Experts investigate an Italian mountain that has stood witness to inexplicable phenomena for centuries, wondering whether it could somehow be attracting alien visitors

Eva Braun is Adolf Hitler's most famous girlfriend - but she was not his first. Many lovers died in mysterious circumstances - and conspiracy theories abound

The rumour that the tomb of Turco-Mongol conqueror Timur is cursed such that whoever disturbs it will face a calamity

This latest collection of objects comprises an intriguing 35,000-year-old box, a steam-powered gun and a monument that may have been an Aztec throne

The idea that aliens may have given human brains incredible untapped abilities. Experts ask whether harnessing these hidden powers could spark the next step in man's evolution.