It's been tipping over for 800 years - what's the gravity-defying magic behind Pisa's leaning tower? And, how are chocolate digestive biscuits manufactured?

When a Chinese moon rover breaks down, a NASA scientist points to a mysterious material that seemed to sabotage the Apollo missions, decades earlier.

Newly discovered documents reveal NASA's secret plan B for failure of the first moon landing. And NASA's Cassini mission unravels a 300-year-old mystery.

Experts use cutting-edge technology to investigate one of the wonders of the modern world. They reveal mysteries hidden in its foundation.

Experts use cutting-edge technology to investigate a lost city buried in the Sahara. Archaeologists are uncovering the city's forgotten ruins and dark secrets.

How are everyday objects made? Common items including Moccasins, Electronic Impact Drills go under the microscope.

More everyday items go under the microscope. How are objects including kimchi and traditional parquet floors made?

More everyday items go under the microscope. How are objects including raw pet food and replica police lanterns made?

More everyday items go under the microscope. How are objects including calissons and diving watercrafts made?

More everyday items go under the microscope. How are objects including game tables and art glass wall sconces made?

More everyday items go under the microscope. How are objects including Marseille soap and Laguiole pocket knives made?

In Cremona, how do they make modern violins that sound as good as the legendary Stradivarius? And, how do they build houses with volcanic rock?

How does a Dutch company make the world's fastest superyachts? And, how do they make new space suits that weigh and cost the fifth of the previous design?

How do planes take off and land on a beach at one of the world's oldest airports? And, how do they hand-make the national dress of Bavaria, lederhosen?

How do they catch the world's largest lobsters? How do they build the iconic chesterfield sofa? And, how do they capture the world's sharpest TV pictures?

How do they take a car from Siberia to the Sahara without leaving Germany? Plus, how do they hand craft a baseball glove that will last a lifetime?

How do they print over 10 million copies a day of the world's best-selling newspaper? How do they knit 32,000 pairs of socks a day at South Africa's biggest sock factory?

The NASA tapes that recorded the Apollo 11 moon landing are missing. Experts examine whether their disappearance is part of a cover-up.

Some think the waving US flag on the moon proves that NASA faked the lunar landing. Experts' quest for the truth leads to some of Hollywood's biggest names.

Three cosmonauts die mysteriously as they re-enter Earth's atmosphere. Plus, a NASA rover discovers clues that help solve a murder.

Two astronauts trapped in the vacuum of space face an agonising death. Plus, the first close up images of Pluto reveal an alien landscape.

Find out how coconut charcoal, dial indicators, wet downdraft tables, and bassoon reeds are made.

Find out how pasta dyes, blueberries, composting toilets, and surge arresters are made.

Find out how angle grinders, berry baskets, and omnidirectional speakers are made.

Find out how cartridge blades, chocolate banana loaves, vending machines, and dive computers are made.

Find out how ultra-thin glass, pallet dismantling machines, cupcakes, and seamless stainless steel tubes are made.

Find out how Potash, Leather Bracelets, Wild Rice, and Hex Key L Wrenches are made.

Paul treks deep into the woods of the Midwest in search of Bigfoot. He cuts through hoaxes and misinformation to uncover ground-breaking evidence.

Paul investigates a surge in demonic activity in America that is overwhelming the Catholic Church. He follows leads from Gary, Indiana, to Mineral Wells, Texas.

In 1945, five US Navy planes vanished without a trace in the Bermuda Triangle. Experts investigate why the planes disappeared and where they could be today.

A witness claims to have discovered a long-lost ship. Experts launch an investigation to try and positively identify the missing vessel.

Paranormal investigators reveal a bold new theory about the origins of the Wendigo. Are the stories of this terrifying creature with cannibalistic cravings true?

Experts investigate evidence suggesting that one of the world's most elusive figures, the Yeti, lives in America and may have an otherworldly source.

Phil Torres and Jessica Chobot embark on a mission to find out what's happening on the Island of the Dolls - a dangerous place that locals have long avoided.

Jessica Chobot and Phil Torres dive into the legend of Mothman by searching for clues in a long-sealed bunker and a top-secret Air Force base.

Paul treks deep into the woods of the Midwest in search of Bigfoot. He cuts through hoaxes and misinformation to uncover ground-breaking evidence.

Paul investigates a surge in demonic activity in America that is overwhelming the Catholic Church. He follows leads from Gary, Indiana, to Mineral Wells, Texas.

In Cremona, how do they make modern violins that sound as good as the legendary Stradivarius? And, how do they build houses with volcanic rock?

How does a Dutch company make the world's fastest superyachts? And, how do they make new space suits that weigh and cost the fifth of the previous design?

How do planes take off and land on a beach at one of the world's oldest airports? And, how do they hand-make the national dress of Bavaria, lederhosen?