The Roman Empire built Hadrian's Wall to guard its frontiers; new discoveries reveal who the Romans were trying to keep out with this 72-mile-long megastructure. Jakso 12 Kausi 4 Vuosi 2019

More everyday items go under the microscope. What are the production processes behind common objects such as beehives and cast iron cookers? Jakso 17 Kausi 25 Vuosi 2017

More everyday items go under the microscope. What are the production processes behind common objects including ochre and hurdy gurdies? Jakso 18 Kausi 25 Vuosi 2017

More everyday items go under the microscope. How are common objects including exhaust headers and moulded limestone artwork made? Jakso 19 Kausi 25 Vuosi 2017

More everyday items go under the microscope. What are the production processes behind common objects such as recycled skateboard guitars? Jakso 20 Kausi 25 Vuosi 2017

How do they blow the world's finest crystal, heat the deepest swimming pool, and fill a million bottles a day of the world's favourite ketchup? Jakso 13 Kausi 13 Vuosi 2015

How do they turn Sheffield steel into a carpenter's handsaw, make a microphone that can pick up a whisper, and safely steer through a frozen river? Jakso 15 Kausi 13 Vuosi 2015

How do they mine one of the rarest gemstones in the world, craft the classic cowboy boot, and build a road sweeper that can pick up seven tonnes of trash? Jakso 17 Kausi 13 Vuosi 2015

How do they make the world's softest duvets, drill for oil thousands of metres below ground, and put the stretch in rubber bands? Jakso 18 Kausi 13 Vuosi 2015

How do they build a diesel engine that can fly, make cough sweets, turn clear plastic into bank notes, and whip up ice cream flavours? Jakso 19 Kausi 13 Vuosi 2015

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. Jakso 5 Kausi 3 Vuosi 2016

Three cosmonauts die mysteriously as they re-enter Earth's atmosphere. Plus, a NASA rover discovers clues that help solve a murder. Jakso 6 Kausi 3 Vuosi 2016

Two astronauts trapped in the vacuum of space face an agonising death. Plus, the first close up images of Pluto reveal an alien landscape. Jakso 7 Kausi 3 Vuosi 2016

A countdown of the top 20 internet legends. From lighting matches with bullets to kayaking in the snow, this features only the smartest and bravest human-kind has to offer! Jakso 5 Kausi 6 Vuosi 2018

Focuses on creative garage innovators taking inventions to the next level, from using fire to charge phones to creating the world's fastest electric dragster. Jakso 6 Kausi 6 Vuosi 2018

How do they pick, process and can thousands of tonnes of grapefruit? And, how do they build conveyor belts to carry millions of pieces of luggage every year? Jakso 7 Kausi 12 Vuosi 2014

How do they make the world's finest harp strings? How do they build roof windows that can keep out a hurricane? And, How do they make Belgian waffles? Jakso 8 Kausi 12 Vuosi 2014

How do they turn scrap metal into luxury cookers? How do they hand roll billions of sticks of incense? And, how do they make jenever, the original form of gin? Jakso 9 Kausi 12 Vuosi 2014

How do they run a farm with robots? How do they build a machine to pick up thirty tonnes of logs in a single grab? And, how do they move the world's most valuable pianos? Jakso 10 Kausi 12 Vuosi 2014

How do they build a towering scaffold from giant poles of bamboo? And how do they mine for the mineral that makes fireworks burn red? Jakso 11 Kausi 12 Vuosi 2014

How do they handcraft Espadrilles shoes? How do they make prefabricated houses? And how they store priceless documents to keep them safe for hundreds of years? Jakso 12 Kausi 12 Vuosi 2014

Archaeological investigations unearth the secrets of the long-lost city. New evidence reveals what Babylon looked like and what caused its downfall. Jakso 23 Kausi 4 Vuosi 2019

The World Trade Centre's iconic twin towers were an engineering marvel. Experts use pioneering technology to examine their secret history. Jakso 24 Kausi 4 Vuosi 2019

New discoveries have revealed thousands of exoplanets beyond our solar system. Some resemble earth to the extent that one could be a new home for humanity. Jakso 10 Kausi 7 Vuosi 2018

Six experts deploy CIA-developed link analysis software, special ops intelligence training and extensive research to find out if aliens have made contact with Earth. Jakso 1 Kausi 1 Vuosi 2019

The team identifies a pattern of non-terrestrial sounds and odd sightings centred around an earthquake. Could some earthquakes be related to UFO activity? Jakso 2 Kausi 1 Vuosi 2019

How do they turn a family car into a fortress on wheels, grow millions of perfect Christmas trees and hammer out the world's finest cymbals? Jakso 20 Kausi 13 Vuosi 2015

How do they turn used aluminium cans into planes and rockets? Plus, how do they carve the traditional Black Forest cuckoo clock? Jakso 1 Kausi 14 Vuosi 2016

How do they build the ultimate car crushing colossus? Plus, how do Lea and Perrins concoct their Worcestershire sauce? Jakso 2 Kausi 14 Vuosi 2016

A look at how the amazing, and massive, decorations on Mardi Gras carnival floats are created, how rock candy is twisted together, and a look at how dentures are made. Jakso 3 Kausi 14 Vuosi 2016

How do they harvest and treat the world's most expensive tea? Plus, how does the Siekierki power plant of Warsaw, Poland heat half the city's homes? Jakso 4 Kausi 14 Vuosi 2016

How do they engineer the latest incarnation of the classic Royal Enfield Continental GT motorbike? Plus, how do 'art detectives' spot a forgery? Jakso 5 Kausi 14 Vuosi 2016

Brook and Brian help Marc vet four new products, including a vehicle that allows cyclists to reach highway speeds and the first-ever indestructible shoelace. Jakso 1 Kausi 1 Vuosi 2015

Brook and Brian help Marc vet four new products, including a brain-controlled toy helicopter and a fetch toy that dogs can control by themselves. Jakso 2 Kausi 1 Vuosi 2015

Witness the world's top 20 YouTube power junkies including: a neighbourhood shaking speaker system, human waves in Japan and a very odd singing candle. Jakso 5 Kausi 1 Vuosi 2010

Count down through the top 20 YouTube masters of chaos including the creators of solar death ray. Plus find out what it's like to be shot with an AK-47. Jakso 6 Kausi 1 Vuosi 2010

Dark matter and energy battle for the cosmos and the winner will determine the universe's fate. New discoveries may reveal which force will win. Jakso 7 Kausi 7 Vuosi 2018

For 20 years NASA's Cassini spacecraft revealed Saturn's strange secrets until it vaporized in its atmosphere. Now, fresh data points to new discoveries. Jakso 8 Kausi 7 Vuosi 2018

There are billions of stars in the galaxy, with billions of planets surrounding them. New discoveries force the question - is Earth the only planet with life on it? Jakso 9 Kausi 7 Vuosi 2018

The underground bunker of Adolf Hitler is home to some of the greatest secrets of the Nazi regime. Experts use cutting-edge technology to uncover new evidence. Jakso 13 Kausi 4 Vuosi 2019