WYSJ-CD

Ancient Rome's development of a highway network.

Greek shipbuilding evolves over 2,500 years.

Ancient Chinese weapons.

Monumental architecture of ancient Egypt.

Ancient Egypt introduces surgery, amputation and prescription medicine.

The Maya use tools to carve limestone; making cement and building roads in the ancient empire.

The beginnings of modern agriculture; host Michael Guillen.

Ancient Romans lived in high-rise apartment buildings that featured amenities associated with modern-day life.

Ancient Rome's development of a highway network.

Greek shipbuilding evolves over 2,500 years.

Ancient Chinese weapons.

Monumental architecture of ancient Egypt.

Ancient Egypt introduces surgery, amputation and prescription medicine.

The Maya use tools to carve limestone; making cement and building roads in the ancient empire.

As spring arrives, hard-working family farms across the United States gamble everything they have on new land, equipment and livestock to stay in business and stay together.

Family farms across the United States race to prepare their fields and plant their crops; one family operation faces the worst drought in decades, while another family gets a scare that puts their lives in perspective.

It is the last chance for family farms to put seed in the ground before the planting window closes; a farmer and his wife reconcile to finish planting, while another leaves his fields at a crucial time.

With the crops in the ground and hundreds of thousands of dollars on the line, farmers must protect their investment and fight back when their fields are threatened by a variety of pests.

It's mid-summer and, with winter wheat ready to harvest, it's the year's first opportunity for a payday and a chance to break out the combines; stress is at an all-time high.

As September arrives and fall harvest begins, two farms face life or death struggles with their livestock, while a third races to get their crop harvested and help a neighbor in trouble.

Harvest season hits high gear and judgement day arrives for some of the year's biggest gambles as bank payments loom and legacies are at stake.

As fall draws to a close, the last harvests are do-or-die for these family businesses that have put everything on the line to stay afloat and set themselves up for the future.

As spring arrives, hard-working family farms across the United States gamble everything they have on new land, equipment and livestock to stay in business and stay together.

Family farms across the United States race to prepare their fields and plant their crops; one family operation faces the worst drought in decades, while another family gets a scare that puts their lives in perspective.

It is the last chance for family farms to put seed in the ground before the planting window closes; a farmer and his wife reconcile to finish planting, while another leaves his fields at a crucial time.

With the crops in the ground and hundreds of thousands of dollars on the line, farmers must protect their investment and fight back when their fields are threatened by a variety of pests.

It's mid-summer and, with winter wheat ready to harvest, it's the year's first opportunity for a payday and a chance to break out the combines; stress is at an all-time high.

As September arrives and fall harvest begins, two farms face life or death struggles with their livestock, while a third races to get their crop harvested and help a neighbor in trouble.

Harvest season hits high gear and judgement day arrives for some of the year's biggest gambles as bank payments loom and legacies are at stake.

As fall draws to a close, the last harvests are do-or-die for these family businesses that have put everything on the line to stay afloat and set themselves up for the future.

As spring arrives, hard-working family farms across the United States gamble everything they have on new land, equipment and livestock to stay in business and stay together.

Family farms across the United States race to prepare their fields and plant their crops; one family operation faces the worst drought in decades, while another family gets a scare that puts their lives in perspective.

It is the last chance for family farms to put seed in the ground before the planting window closes; a farmer and his wife reconcile to finish planting, while another leaves his fields at a crucial time.

With the crops in the ground and hundreds of thousands of dollars on the line, farmers must protect their investment and fight back when their fields are threatened by a variety of pests.

It's mid-summer and, with winter wheat ready to harvest, it's the year's first opportunity for a payday and a chance to break out the combines; stress is at an all-time high.

As September arrives and fall harvest begins, two farms face life or death struggles with their livestock, while a third races to get their crop harvested and help a neighbor in trouble.

Harvest season hits high gear and judgement day arrives for some of the year's biggest gambles as bank payments loom and legacies are at stake.

As fall draws to a close, the last harvests are do-or-die for these family businesses that have put everything on the line to stay afloat and set themselves up for the future.

When a burning gusher shoots flames into the air, only a handful of men know how to snuff out the monster; fighting fire with fire, they place explosives around the flames to blow it out, or douse it with tons of water.

The most dangerous snakes, sports, weather events; America's most dangerous volcano; tornado hazards; base jumping.

The Koenigsegg CCR automobile; the Shanghai Maglev train; motorboat racer Ken Warby and the Spirit of Australia; the Kingda Ka roller coaster; the Holloman High Speed Test Track.

Strength measurement explores why some things are stronger than others; examine rope, tractor, diamond, tugboat, and plastic strength from Spectra fiber to Lexan, discovering where, how, and why strength matters in daily life applications.

What does it take to rate as "the world's strongest"? Watch as life-saving boron carbide body armor, strong enough to stop 9mm machine gun bullets at point-blank range, is put to the test.

Pyroman the life-size mannequin is exposed to more than 1,000 degrees F; steel workers suit up to beat refinery heat; coffee makers and hair dryers malfunction at Underwriters Laboratories; a friction lab tests aircraft and race-car brakes.

Episode takes the "best of" Modern Marvels and give the mega top 10 countdown; on this edition: amazing weapons; they're every arsenal's best asset and every enemy's worst nightmare.

Mega stores are giant facilities engineered to keep up with America's supersized habits; they are the largest, busiest places in the country; their greatest challenge: keeping up with demand on a massive scale.

When a burning gusher shoots flames into the air, only a handful of men know how to snuff out the monster; fighting fire with fire, they place explosives around the flames to blow it out, or douse it with tons of water.

The most dangerous snakes, sports, weather events; America's most dangerous volcano; tornado hazards; base jumping.

The Koenigsegg CCR automobile; the Shanghai Maglev train; motorboat racer Ken Warby and the Spirit of Australia; the Kingda Ka roller coaster; the Holloman High Speed Test Track.

Strength measurement explores why some things are stronger than others; examine rope, tractor, diamond, tugboat, and plastic strength from Spectra fiber to Lexan, discovering where, how, and why strength matters in daily life applications.

What does it take to rate as "the world's strongest"? Watch as life-saving boron carbide body armor, strong enough to stop 9mm machine gun bullets at point-blank range, is put to the test.

Pyroman the life-size mannequin is exposed to more than 1,000 degrees F; steel workers suit up to beat refinery heat; coffee makers and hair dryers malfunction at Underwriters Laboratories; a friction lab tests aircraft and race-car brakes.

Episode takes the "best of" Modern Marvels and give the mega top 10 countdown; on this edition: amazing weapons; they're every arsenal's best asset and every enemy's worst nightmare.

Mega stores are giant facilities engineered to keep up with America's supersized habits; they are the largest, busiest places in the country; their greatest challenge: keeping up with demand on a massive scale.

When a burning gusher shoots flames into the air, only a handful of men know how to snuff out the monster; fighting fire with fire, they place explosives around the flames to blow it out, or douse it with tons of water.

The most dangerous snakes, sports, weather events; America's most dangerous volcano; tornado hazards; base jumping.

The Koenigsegg CCR automobile; the Shanghai Maglev train; motorboat racer Ken Warby and the Spirit of Australia; the Kingda Ka roller coaster; the Holloman High Speed Test Track.

Strength measurement explores why some things are stronger than others; examine rope, tractor, diamond, tugboat, and plastic strength from Spectra fiber to Lexan, discovering where, how, and why strength matters in daily life applications.

What does it take to rate as "the world's strongest"? Watch as life-saving boron carbide body armor, strong enough to stop 9mm machine gun bullets at point-blank range, is put to the test.

Pyroman the life-size mannequin is exposed to more than 1,000 degrees F; steel workers suit up to beat refinery heat; coffee makers and hair dryers malfunction at Underwriters Laboratories; a friction lab tests aircraft and race-car brakes.

Episode takes the "best of" Modern Marvels and give the mega top 10 countdown; on this edition: amazing weapons; they're every arsenal's best asset and every enemy's worst nightmare.

Mega stores are giant facilities engineered to keep up with America's supersized habits; they are the largest, busiest places in the country; their greatest challenge: keeping up with demand on a massive scale.

The fate of mankind's machinery of war; a sunken nuclear missile explodes; Pearl Harbor comes under new attacks; snow causes urban avalanches; dairy cows are threatened; events in Denver, Hawaii and a mysterious island near New York City.

The quest for immortality and what might happen to bodies left behind that were embalmed and buried, mummified or cryogenically frozen in a post-human world.

The fate of entombed treasures, including the contents of a mysterious "doomsday vault," the "Mona Lisa" and the Declaration of Independence; Philadelphia's Liberty Bell cracks for good; San Francisco cable cars and bridges snap.

Some apocalyptic fates of homes: Gas leaks turn suburbs into infernos, a hidden flaw topples a castle, and paint causes some high-end houses to explode in flames.

Earth is invaded by predatory forces; pythons that were formerly pets battle native alligators for domination in the Everglades; invasive plants strip oxygen from rivers and lakes; desert sandstorms invade Phoenix; Shanghai sinks.

Imagining the future of Chicago, Atlanta and London in a world devoid of people and being overtaken by the forces of nature.

The possible post-apocalyptic future of U.S. gambling meccas; a new rat pack takes over, wax figures of celebrities melt and iconic hotels crumble in Las Vegas; the ocean tears apart Atlantic City hotels, but the boardwalk stands fast.

Structures of God and symbols of Satan face their post-apocalyptic fate, as churches crumble and the devil's minions multiply.

The fate of mankind's machinery of war; a sunken nuclear missile explodes; Pearl Harbor comes under new attacks; snow causes urban avalanches; dairy cows are threatened; events in Denver, Hawaii and a mysterious island near New York City.

The quest for immortality and what might happen to bodies left behind that were embalmed and buried, mummified or cryogenically frozen in a post-human world.

The fate of entombed treasures, including the contents of a mysterious "doomsday vault," the "Mona Lisa" and the Declaration of Independence; Philadelphia's Liberty Bell cracks for good; San Francisco cable cars and bridges snap.

Some apocalyptic fates of homes: Gas leaks turn suburbs into infernos, a hidden flaw topples a castle, and paint causes some high-end houses to explode in flames.

Earth is invaded by predatory forces; pythons that were formerly pets battle native alligators for domination in the Everglades; invasive plants strip oxygen from rivers and lakes; desert sandstorms invade Phoenix; Shanghai sinks.

Imagining the future of Chicago, Atlanta and London in a world devoid of people and being overtaken by the forces of nature.

The possible post-apocalyptic future of U.S. gambling meccas; a new rat pack takes over, wax figures of celebrities melt and iconic hotels crumble in Las Vegas; the ocean tears apart Atlantic City hotels, but the boardwalk stands fast.

Structures of God and symbols of Satan face their post-apocalyptic fate, as churches crumble and the devil's minions multiply.

The fate of mankind's machinery of war; a sunken nuclear missile explodes; Pearl Harbor comes under new attacks; snow causes urban avalanches; dairy cows are threatened; events in Denver, Hawaii and a mysterious island near New York City.

The quest for immortality and what might happen to bodies left behind that were embalmed and buried, mummified or cryogenically frozen in a post-human world.

The fate of entombed treasures, including the contents of a mysterious "doomsday vault," the "Mona Lisa" and the Declaration of Independence; Philadelphia's Liberty Bell cracks for good; San Francisco cable cars and bridges snap.

Some apocalyptic fates of homes: Gas leaks turn suburbs into infernos, a hidden flaw topples a castle, and paint causes some high-end houses to explode in flames.

Earth is invaded by predatory forces; pythons that were formerly pets battle native alligators for domination in the Everglades; invasive plants strip oxygen from rivers and lakes; desert sandstorms invade Phoenix; Shanghai sinks.

Imagining the future of Chicago, Atlanta and London in a world devoid of people and being overtaken by the forces of nature.

Michelangelo is one of the most famous artists in history, and managed to paint a bunch of naked dudes 60 feet in the air on the ceiling of the Sistine Chapel; Nate takes a look at the science behind fresco painting.

Moons of the gas giants, each is a unique and mysterious world of its own; some have oceans of water, geysers of Sulphur or atmospheres of plastic.

University student garden; green development; new green products.

The team attempts to build the Roman crane.

The story of the ups and downs in the life of poet T.S. Eliot, whose work would become the basis for "Cats," one of the most successful musicals of all time.

Bonnie and Clyde are killed in an ambush set up by the Texas Highway Patrol.

The ten most explosive and expensive breakups of the past decade.

How Playboy magazine changed the world and its continued impact on people's daily lives.

Italian immigrant and sometime gigolo Rudolph Valentino becomes the first Hollywood superstar.

Profile of Casanova, the legendary king of sexual seduction who also was a skilled writer and diplomat.

With a life as compelling as any of her best-sellers, Danielle Steel has had a roller coaster ride of professional success and personal tragedy.

The story of the ups and downs in the life of poet T.S. Eliot, whose work would become the basis for "Cats," one of the most successful musicals of all time.

Bonnie and Clyde are killed in an ambush set up by the Texas Highway Patrol.

The ten most explosive and expensive breakups of the past decade.

How Playboy magazine changed the world and its continued impact on people's daily lives.

Italian immigrant and sometime gigolo Rudolph Valentino becomes the first Hollywood superstar.

Profile of Casanova, the legendary king of sexual seduction who also was a skilled writer and diplomat.

With a life as compelling as any of her best-sellers, Danielle Steel has had a roller coaster ride of professional success and personal tragedy.

The story of the ups and downs in the life of poet T.S. Eliot, whose work would become the basis for "Cats," one of the most successful musicals of all time.

Bonnie and Clyde are killed in an ambush set up by the Texas Highway Patrol.

The ten most explosive and expensive breakups of the past decade.

How Playboy magazine changed the world and its continued impact on people's daily lives.

On April 7, 2004, a group of U.S. Marines got ambushed near Fallujah, Iraq; together, the Marines fight on, making 1st Reconnaissance Battalion, Bravo Company, 2nd Platoon one of the most decorated platoons for heroism in the War on Terror.

In Iraq, a team of U.S. Army Rangers leads a covert operation to take out high value targets; deep in enemy territory, it's the implicit trust among team members that allows them overcome hurdle after hurdle.

A platoon loses both 19-year-old Pvc. Eric Hario and seasoned Staff Sgt. Jason Dahlke on a battle damage assessment mission in Afghanistan; life will never be the same for the Army Rangers or for Eric and Jason's family members back home.

U.S. Army Ranger Trent McDonald becomes renowned for his dog whispering skills; McDonald loses his best friend and military service dog, Benno, on a night raid in Afghanistan in 2012, then his new dog, Layka, gets shot weeks later while saving lives.

One of the first veterans helped by Jim and Lindsey spirals back into depression; another veteran's family struggles to adjust to life with a service dog.

A war veteran suffering from post-traumatic stress disorder as a result of a combat explosion hopes that a shelter dog from Paws and Stripes can help alleviate his night terrors.

A young wife and mother who served as a prison guard in Iraq is matched with a service dog; Jim tries to find the proper placement for a fun-loving canine.

A former soldier who disarmed explosives in Iraq tries to hide his symptoms of post-traumatic stress disorder and his troubles with alcohol.

On April 7, 2004, a group of U.S. Marines got ambushed near Fallujah, Iraq; together, the Marines fight on, making 1st Reconnaissance Battalion, Bravo Company, 2nd Platoon one of the most decorated platoons for heroism in the War on Terror.

In Iraq, a team of U.S. Army Rangers leads a covert operation to take out high value targets; deep in enemy territory, it's the implicit trust among team members that allows them overcome hurdle after hurdle.

A platoon loses both 19-year-old Pvc. Eric Hario and seasoned Staff Sgt. Jason Dahlke on a battle damage assessment mission in Afghanistan; life will never be the same for the Army Rangers or for Eric and Jason's family members back home.

U.S. Army Ranger Trent McDonald becomes renowned for his dog whispering skills; McDonald loses his best friend and military service dog, Benno, on a night raid in Afghanistan in 2012, then his new dog, Layka, gets shot weeks later while saving lives.

One of the first veterans helped by Jim and Lindsey spirals back into depression; another veteran's family struggles to adjust to life with a service dog.

A war veteran suffering from post-traumatic stress disorder as a result of a combat explosion hopes that a shelter dog from Paws and Stripes can help alleviate his night terrors.

A young wife and mother who served as a prison guard in Iraq is matched with a service dog; Jim tries to find the proper placement for a fun-loving canine.

A former soldier who disarmed explosives in Iraq tries to hide his symptoms of post-traumatic stress disorder and his troubles with alcohol.

On April 7, 2004, a group of U.S. Marines got ambushed near Fallujah, Iraq; together, the Marines fight on, making 1st Reconnaissance Battalion, Bravo Company, 2nd Platoon one of the most decorated platoons for heroism in the War on Terror.