More everyday items go under the microscope with a look at how objects such as lace and unicycle wheel hubs are made.

How do they handcraft Espadrilles shoes? How do they make prefabricated houses? How they store priceless documents to keep them safe for hundreds of years?

How do they harvest and process the world's toughest and most expensive nut? How do they turn lake water into tap water? How do they hold back fans at gigs?

How do they build the biggest apartment block on the planet? How do they make the classic British boot? How do they make cooking pans last a lifetime?

How do they craft a classic Indian instrument, the Sitar? How do they make beef biltong? Plus, how do they build monster bulldozers?

How do they fashion the Fedora hat? How do they make the cement that builds the world? How do they harvest and freeze millions of peas in under three hours?

Some of the brightest minds and theorists on the planet explore the limits of human knowledge and explain the science behind the rules of the universe.

The universe's stars are dying faster than new ones are born. Experts investigate the last stars of the cosmos and what a stellar apocalypse means for Earth.

26,000 lightyears away at the heart of the galaxy lies a massive black hole. How can something so far away be studied, and what could it teach scientists?

Danny Forster investigates the most important public works project in New York City's history, the $15 billion expansion of the subway system.

Danny Forster visits the London Aquatics Centre, which hosted 44 swimming and diving events during the 2012 Olympics.

How do they make the king of cheeses, Parmesan? How do they keep the runways running at the world's busiest airports? How do they manufacture relaxing reclining chairs?

How do they weave a Turkish carpet? How do they use helicopter blade technology for cross country skis, and control the water at Niagara Falls?

How do they cast the streetlamps of Venice? How do they prevent another Titanic-like disaster? How do they grow tiny trees for the ancient Chinese art of penjing?

How do they make one of the world's fastest bikes? How do pilots train for death-defying acrobatics? And, how do they bring oil and gas up from the bottom of the sea?

How do they hand-roll New York bagels? How do they make a racing car tyre to grip the track at 320 km an hour? And, how do they make lifelike sculptures out of glass?

How do they collect the trash in road-free Venice? How do they make Australia's famous sheepskin boots? And, how do they turn pond algae into a health supplement?

The Inca capital of Cusco was supposedly the site of untold gold and riches. New discoveries reveal the secrets behind this mighty empire's fall.

When a Viking fortress lost underground for over 1,000 years is discovered, experts investigate its buried treasures. What caused this civilization's demise?

Did Apollo astronauts hear unexplained transmissions on the far side of the moon? Plus, an astronomer spots a strange disturbance in Martian atmosphere.

Apollo 12 astronauts bring back something alive from the moon. Plus, NASA track an asteroid heading towards Earth and make a shocking discovery.

Geysers are discovered on a frozen moon, NASA redirects a probe on a mission to find proof of life, and a future US President is eyewitness to a UFO.

How do they harvest thousands of tonnes of tea? How to they make sure that your luggage catches the same plane as you? How are high-quality hairbrushes made?

How do they keep the crooks from cracking into your credit card? How do they lift a 1000-tonne ship into the air while it is still in the water?

How do they build massive tunnels to prevent blackouts in one of the world's biggest cities? How do they turn pine forest into perfect pieces of timber?

How do they make the favourite sweet of the Ottomans, James Bond's gyroplane and the Supercat- the world's fastest ferry?

How do they carve longboards, turn millions of lemons into juice, and build industry's versatile heavy lifter, the forklift truck?

How do they roast the coffee that wakes up Italy, bake the bricks that build America, and blast diamonds from a frozen volcano?

Discover how wax figures, awnings, sandwich crackers and pewter tankards are made.

Find out how common items like pipe cleaners, blue stilton cheese, smart electric meters and telescopes are made.

Discover how fish replicas, siren systems, pre-packaged sandwiches and candlesticks are produced.

Find out how everyday items such as tapioca pudding, snow ploughs, paddle boats and fibre cement siding are produced.

How do they produce a million tonnes of stainless steel? How do they keep cash safe with an uncrackable lock? How do they make traditional Indian sugar?

Many items that make up the modern world are the result of sophisticated engineering and production processes. How do they do it?

How do they build one of the world's most exclusive luxury cars? How do they make a referee's whistle that can be heard above 50,000 screaming fans?

How do they turn English willow into cricket bats for India's finest cricketers? And, how do they construct the foundations for tall buildings?

Apollo 12 astronauts bring back something alive from the moon and NASA track an asteroid heading towards Earth only to make a shocking discovery.

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.

Rob Nelson investigates the mysterious rocks at the bottom of Lake Michigan known as Underwater Stonehenge. Plus, the search for escape tunnels in Alcatraz.

Rob Nelson investigates mysterious tunnels under Denver's airport. Plus, in Ohio he tries to uncover the secrets of a giant serpent-shaped mound.

More everyday items are put under the microscope as we discover how motion sensors and diving helmets are made.

More everyday items are put under the microscope as we discover how rawhide lampshades and MRI scanners are made.

More everyday items are put under the microscope as we discover how membrane filters, bridge ties, and Bi-planes are made.