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S04E08
A startling image taken by a Nasa probe points to evidence of life on MarsS05E02
Scientists discuss baffling temperature readings from JupiterS04E13
Experts uncover new evidence of the underground bunker of Adolf HitlerS04E14
The reason behind the tilt in one of the world's most iconic buildingsS13E17
The technological processes involved in mining rare gemstonesS13E18
How engineers drill for oil thousands of metres below groundS03E03
An Apollo 17 photo seems to show a US military outpost on the moonS03E04
Mysterious lunar materials that may have caused trouble for an Apollo missionS03E05
Details of NASA's contingency plan to cope with a failed first moon landingS02E03
Exploring the idea of 'ancient astronauts'S02E04
Exploring America's founding fathersS04E25
Experts reveal why Egypt's Black Pyramid collapsedS04E26
Scanning the ocean floor in search of sunken sphinxes, temples and shipwrecksS05E03
The mysteries surrounding the sun's supposed 'dark twin'S03E20
The truth about strange 'alien' deposits found on Earth's surfaceS05E05
A familiar structure on the surface of MarsS14E02
Making Worcestershire sauceS14E03
Floats for the Mardi Gras carnivalS14E04
Harvesting the world's most expensive teaS14E05
An insight into how a classic British bike is being rebooted in IndiaS14E06
The making of Dutch tableware and pocket-sized umbrellasS14E08
The development of lights that are transforming popular sport worldwideS01E03
Russell finds a structure he believes is a Bigfoot nestS01E04
Mireya and Ronny make a powerful discoveryS01E03
Explorers Justin Fornal and Emiliano Ruprah investigate the Knights TemplarS01E04
Explorer Justin Fornal and Emiliano Ruprah investigate an international conspiracy
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