Modern Marvels - Season 18 (2011)

It's a great American wilderness–millions of acres of wild, primeval land with its own people, its own technology…and its own rules. Survival there depends on smarts and science, guts and grueling work…and a unique approach to one of the world's most uncompromising environments–swamps. Watch an assembly of the distinctive airboat, then hop on board for a breathtaking journey and discover the surprising history behind this swamp staple of transportation. Take a wild ride on a big-tired swamp buggy, and taste test some local delicacies that bring new meaning to "acquired taste." Witness a massive engineering project to divert the mighty Mississippi River, and meet the machines that make that job possible. Plus come face to face, literally, with enormous pythons and menacing alligators.

Food Trucks are hitting the big time–across much of America, they're changing the way we eat. From humble beginnings as chuck wagons and hot dog carts, they've taken off as ethnic eateries, gourmet specialists, and even high-tech mega trucks that serve thousands at disaster scenes. Not surprisingly, it takes some pretty sophisticated engineering to make it all work–and turn a truck into a kitchen on wheels.

It has been said that necessity is the mother of all invention–but that is not always the case. Some strange machines are built for sheer spectacle, some a glimpse into the future or even the past, while others are just plain…Weird. Take a look at machines that specialize in high functionality and low practicality, prompting two very important questions: What is it and…how do I get one? An Alaskan navigates the Juneau waters with his homemade submarine. A California company shocks local beach bums with their fully submersible "shark boats." We'll also meet a bicep-curling robot that's built to save lives; scale a mountain with a 21st century Batman-esque rope ascender; witness an engineered, forty-foot vortex of fire known as the Flame Tornado; and hit the backcountry trails with a snowboard-motorcycle hybrid inspired by a shopping cart.

From the beginning of time we've worked to protect ourselves against the very element that keeps us alive…Water. We love it and hate it. With water covering 75% of the Earth's surface, it's no wonder we struggle to stay safe and dry. We fight against ferocious weather and floods with state-of-the-art roofing, wraps, tarps, tunnels, clothing, boats, and much more… devising extreme tests to probe the limits of our modern waterproof technology.

Hundreds of years before steel and plastic, wood was the building block of America. But even today, it touches every aspect of our lives. It's underneath our feet and flying through the sky, propping up skyscrapers and making burgers fry — from the historical, to the modern, to the timeless, we explore the surprising ways we cannot live without WOOD.

160 million Americans visit a convenience store every day. Why? Because it's fast. But what you probably didn't know is how every detail of its design has been engineered to work that way. Step inside one of the busiest 7-11's in America and find out what makes it tick. And go behind the scenes to see how favorite innovations–like slurpees, turbo ovens, and beef jerky–are made. The science of convenience will amaze you!

"Tiny" weapons may not sound impressive…but small can kill, and it can also be easily concealed. From a pocket pistol used by the police…to a submachine gun wielded by a bodyguard…to a carbine in the hands of an Army Ranger, many of today's most effective weapons are smaller than ever. They can fit in your pocket, fly through the air, even break through walls–tiny weapons are an essential part of battle, self-defense, and spreading terror.

Every aspect of our lives involves pressure. It's what puts the bubbles in soft drinks, propels shaving cream from its can, cools the contents of your refrigerator, and causes volcanoes to erupt. But when pressure suddenly changes, you better look out! Rapid pressure changes can be as violent as explosions. And variable atmospheric pressure? We call that the weather.

Our 49th state is one tough terrain. In the air, on the ground–and deep beneath it–survival here requires an amazing array of technological innovations. From buildings to highways, brutal winters to bug-infested summers, this unforgiving landscape demands creative work-arounds. And then there's the constant threat of natural disasters…tsunami, anyone?