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They're the meat in our sandwiches and slices of American pop culture; take a look behind the deli counter to reveal the secret ingredients in baloney; watch a master sausage maker craft salami, and pile it on at Carnegie Deli.

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It strikes without warning and kills in an instant; we fear its might even as we use it to save a life; explore the electric shock in its numerous forms.

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Geological history from the Stone Age to the Space Age; moon rocks provide clues to how planets were formed; quarrying marble and granite; blasting at a sand-and-gravel pit.

Rocks

Some say pigs are as smart as 3-year-old humans; turning pigs into bacon, ham, ribs and sausage; boar semen collection; the use of pig organs in medicine.

The Pig

Corn is the largest agricultural crop in the world, and it is used in more than 3,000 diverse items, ranging from food to the plastic wrap for packaging it.

Corn

Inventions for holding off a global warming meltdown include giant solar energy towers, a rooftop wind turbine, a car that runs on air and a kite that tows a cargo ship.

Environmental Tech II

It's time to slice and dice; take a cutting-edge look at the most amazing blades in the world, from the legendary sword of the samurai warrior with an edge sharp enough to sever a man's arm in a single swipe.

World's Sharpest

A look at the many uses of acid; the military harnesses acid to make explosives; at a sulfuric acid plant, acid takes the stain out of stainless steel and dissolves precious metals; the Heinz vinegar plant; acid-loving bacteria.

Acid

Freezer unit filled with 135 million pounds of ice cream; Alcor, where researchers keep cadavers on ice in hopes of future revival.

Deep Freeze

Take a supersonic flight through a world of flying machines that are redefining our skies; pull serious G's in the U.S. military's latest fighter jet: the F-35 Joint Strike Fighter.

Extreme Aircraft II

Mixtures of metals and caustic chemicals that make our tech, tools and toys surge with energy; visit the world's most powerful battery in Fairbanks, Alaska--13,760 hulking cells humming with 5,000 volts, ready to help the city survive power outages.

Batteries

Trapping black bears with West Virginia Division of Natural Resources biologists; trapping and releasing feral cats left stranded in New Orleans after Hurricane Katrina.

Traps

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Stories of those who believed in dreams and defied the commonplace with their extraordinary creations; covering some of the world's architectural and engineering structures, scientific inventions, and social wonders.

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From cheddar to brie, Parmesan to blue, take a look at both ancient techniques and new technologies behind some of the world's most popular cheeses; discover how cheese is made.

S13 E19 | Food: Cheese