How Do They Do It?

The secrets behind the color and taste of Ireland's most famous export are revealed. Next, worm saliva is turned into vibrantly colored fabric, and one of the world's favorite comfort foods is kept fresh for two years.

Peanut farmers in Georgia harvest enough nuts to make 10 billion peanut butter sandwiches. Then, experts test thousands of products to make sure they are safe for consumers.

Mud from the bottom of prehistoric seas is used to fight fires. Then, workers restock, refuel and repaint luxury liners, all while taking care of thousands of passengers.

Experts discuss the engineering behind a versatile construction machine. Then, the secret behind the flavor of a favorite sauce is revealed, and workers maintain the sky deck on top of one of the tallest skyscrapers in the world.

Workers pull tons of pure white marble from the heart of a mountain. Then, salt and peppers are turned into Louisiana's favorite hot sauce, and handcrafted umbrellas are made.

Divers harvest undersea creatures for the perfect bath accessory. Then, cabbies navigate one of the world's busiest cities with no wrong turns.

Armored vehicles are built to transfer millions of dollars of cash, and space-age rods are created to catch big game fish. Then, the techniques behind making bagpipes are revealed.

Experts reveal how Scotch whisky gets its distinct flavor. Then, the United States Army Corps of Engineers discuss plans to protect New Orleans from another massive hurricane.

The most advanced crash test lab in the world recreates real-life car crashes. Then, thousands of books are printed in a day, and the process behind making an ingredient that's in everything from cookies to motor oil is revealed.

Experts reveal how tires that can take the weight of a jet touchdown are made. Then, 21st-century technology is used to make the guns that shot up the Wild West, and the perfect playing surface that never needs mowing is created.

Experts discuss some of the methods used to make money difficult to counterfeit. Then, custom shoes are designed and handcrafted for celebrities.

Workers turn fields of green grass into mountains of white sugar. Then, fish farmers raise salmon in waters rife with predators, and tailors create high-quality suits that fit all shapes and sizes in just hours.

Workers recycle old car batteries into new ones. Then, chocolate is extracted from fleshy fruits, and a toothbrush is made that brushes teeth 40,000 times per minute.

Workers maintain one of the world's most popular tourist attractions. Then, the world's largest production motorcycle is made, and cutting-edge snowboards are manufactured.

Caffeine is removed from coffee without affecting the taste. Then, centuries-old techniques are used to make a favorite fish dish, and the next generation of marine propulsion systems is created.

Dogs are used to sniff out evidence of arson, and barrels that give flavor to France's finest wines are made. Then, black rock blasted from the ground helps keep the shine on some classic vehicles.

Lawn mowers are made that not only cut grass, but also break speed records. Then, city traders make sure farmers get a fair price for their wheat in good and bad weather, and fresh, clean water is produced from coconut shells.

Workers travel down in one of America's largest mines to excavate an essential metal. Then, experts create custom, handcrafted shotguns.

Cars are designed that can climb mountains and cross rivers. Then, handcrafted saddles are made, and bakers create high-class cakes for high-class society.

Workers reveal how UPS delivers millions of packages around the world every day. Then, the world's leading match factory turns a single tree into thousands of matches.