The History Channel

Yellowstone National Park is one of the most dangerous geological features on Earth. In trying to uncover the processes behind Yellowstone's main attractions like "Old Faithful," geologists came to the frightening realization that Yellowstone was in fact a vast hidden super-volcano--one that is overdue for a massive eruption. Yellowstone has been on a regular eruption cycle of 600,000 years but the last eruption was over 640,000 years ago, so the next is overdue. An eruption at Yellowstone could be 2,500 times the size of the 1980 Mount St. Helens event. In the past 16.5 million years, the volcano has mysteriously moved hundreds of miles though Nevada across southern Idaho to reach its present location in Yellowstone. But even today it is still active. A swarm of 500 earthquakes hit the park early in 2009 and geologists found that the entire park is being pushed up into the air by hidden forces under the ground. Is this sleeping giant beginning to stir?

Gold dates from the time of the supernova explosion that gave birth to the building blocks of our solar system. When it was created, the Earth included a tiny percentage of gold atoms, and over the aeons geologic processes have concentrated it into various nooks and crannies around the globe. The best of it is in the ancient Precambrian rocks in South Africa, where the deepest mines in the world extract it. In other regions of the world, gold can be gathered from younger sedimentary rocks that have been eroded off older Precambrian rocks. The American gold rush was this type of deposit. Now in Nevada, sedimentary rocks are leached on a truly vast scale to extract the gold.

The single longest linear feature on Earth--the "Ring of Fire" circles almost the entire Pacific. It is a ring of active volcanoes from White Island just north of New Zealand, through the South China seas, Japan, Kamchatka, the Aleutians, the Cascades and down through the Andes. Almost 25,000 miles long, it is one of the most awesome sights on Earth.

The Marianas Trench is the deepest place on earth, deeper than Mt. Everest is high. The trench is where the ocean floor disappears into the center of the earth. The pressures at this depth are 17 times greater than what it takes to crush a nuclear submarine. Only two men have ever been down the Trench, fewer than have set foot on the moon. Follow the daring missions into the abyss and explore the extraordinary geology that has created this deep scar along the ocean floor.

These giant mountain-sized boulders from space have wrought death and destruction throughout the millennia but until recently geologists could find no evidence that they had actually struck the earth. Follow the remarkable detective story that begins at Meteor Crater in Arizona as mining engineers desperately try to unearth the billion dollar iron boulder they thought was lying there. It's a detective story that also uncovers immense riches; the world's biggest nickel deposit in Sudbury, Canada, vast oil reserves in the Gulf of Mexico and a gold mine in South Africa--all the result of asteroid impacts. Evidence is also unearthed of violent impacts that decimated some of the first people to live in America. What clues do asteroids, and their smaller cousins, meteorites, hold in the formation of the early Earth and perhaps life itself?

Yellowstone National Park is one of the most dangerous geological features on Earth. In trying to uncover the processes behind Yellowstone's main attractions like "Old Faithful," geologists came to the frightening realization that Yellowstone was in fact a vast hidden super-volcano--one that is overdue for a massive eruption. Yellowstone has been on a regular eruption cycle of 600,000 years but the last eruption was over 640,000 years ago, so the next is overdue. An eruption at Yellowstone could be 2,500 times the size of the 1980 Mount St. Helens event. In the past 16.5 million years, the volcano has mysteriously moved hundreds of miles though Nevada across southern Idaho to reach its present location in Yellowstone. But even today it is still active. A swarm of 500 earthquakes hit the park early in 2009 and geologists found that the entire park is being pushed up into the air by hidden forces under the ground. Is this sleeping giant beginning to stir?

Scott goes nuts for a `white man's' totem pole. But can he and Sheldon wrestle it out of the ground? A Lethbridge property features a sprawling collection of Old West paraphernalia. The guys try to pick a fellow picker in a former church turned storage facility. And, famous for its nearby ghost towns, the guys visit a Bellevue history museum where everything is for sale.

The guys stop in at a massive moving sale but discover that the property's already been picked. Later, a collector is reluctant to sell but Scott is determined to make the expensive trip worthwhile. After a lifetime of collecting, Jim is motivated to clear out his house and outbuildings. And, the century-old Last Chance Saloon is closing its doors, and it's packed with incredible stuff.

The guys visit a garage sale devotee in Southern Ontario, and then scour a sprawling outdoor antique show where the prices are steep, and where one vendor is driving Scott absolutely nuts! A gentleman farmer throws open the doors to his 150-year-old barn. And, with their new treasures in tow, Scott and Sheldon visit a Waterloo appraiser who has some jaw-dropping news.

In PEI, the guys hit a 70-mile garage sale that's set up clear across the island. Sheldon spots a ceremonial table he simply has to have. While Sheldon eats fresh oysters, Scott searches for treasure. The guys try to pick the Lucy Maud Montgomery Museum. And, a Richmond collector's barn is piled high with treasures and he's ready to make a deal.

The planets of our solar system have experienced epic catastrophes throughout their long history, both raining down from outside and bubbling up from within. We'll voyage back in time to investigate the violent events that profoundly shaped the planets, including earth itself. We'll witness stunning revelations about what transformed Mars into a barren, hostile desert...The disaster that changed Venus from temperate to hellish...The impact that blew away Mercury's mantle, turning it into a planetary core...A colossal disturbance that rearranged the orbits of the gas giants...Titanic impacts on Jupiter...And how a lost moon may finally explain Saturn's rings.

Since the dawn of civilization, humans have wondered who or what created the universe. Religion offers a spiritual answer, but do the latest discoveries in physics show evidence of a transcendent intelligence, or simply that the laws of physics by themselves could have led to the universe in which we live? This episode embarks on a mind-bending scientific search for God, asking physicists and theologians if the seemingly miraculous way the universe has been calibrated to support life is evidence of a creator...whether string theory will eventually be able to rule out the existence of God...why Stephen Hawking says the universe could have been created spontaneously...and how an advanced civilization in another universe could have conceivably created our own.

What might happen if the first manned mission to Mars crashes hundreds of miles from the rocket that would take them back home? Could they survive the crash, and travel across the brutal Martian surface to their home ship? We'll show what the astronauts would have to do to survive dust storms and space radiation, while extracting vital resources like water from the Martian soil itself. It's a dramatic vision of the very near future, where survival can depend on pre-industrial technology and human ingenuity.

We can't compare anything on earth to the biggest things known in space. The Lymann Alpha blob is a bubble like structure containing countless galaxies--perhaps the biggest object in the entire universe. Regions of radio-emitting gas called "radio lobes" could be even bigger. Then there are super galaxy clusters which are hundreds of galaxies merged together due to cosmic collisions. Discover which is the largest planet, star, star cluster, constellation, black hole, volcano, galaxy, explosions, moon, storm, impact crater and "void" in space.

Machines are the lifeblood of the American military. Thousands of both combat and support vehicles face brutal wear and tear brought on by harsh conditions. Watch as the Abrams tank is completely rebuilt, TOW missiles are disassembled and recycled and surplus tanks are used as live-fire targets. Come to the boneyard as they will all be transformed and face an unusual after-life.

Informational programming.

Informational programming.

Informational programming.

Informational programming.

Marvels of the modern age, today's aircraft are awe inspiring. However, once their flying days are over, the boneyard beckons. Dismantling large aircraft is complex and challenging. Some planes will be destroyed while others are restored to their former glory. No matter which fate awaits, the process always takes place in the boneyard.

Scott goes nuts for a `white man's' totem pole. But can he and Sheldon wrestle it out of the ground? A Lethbridge property features a sprawling collection of Old West paraphernalia. The guys try to pick a fellow picker in a former church turned storage facility. And, famous for its nearby ghost towns, the guys visit a Bellevue history museum where everything is for sale.

The guys stop in at a massive moving sale but discover that the property's already been picked. Later, a collector is reluctant to sell but Scott is determined to make the expensive trip worthwhile. After a lifetime of collecting, Jim is motivated to clear out his house and outbuildings. And, the century-old Last Chance Saloon is closing its doors, and it's packed with incredible stuff.

The guys visit a garage sale devotee in Southern Ontario, and then scour a sprawling outdoor antique show where the prices are steep, and where one vendor is driving Scott absolutely nuts! A gentleman farmer throws open the doors to his 150-year-old barn. And, with their new treasures in tow, Scott and Sheldon visit a Waterloo appraiser who has some jaw-dropping news.