Ever since the 1950s, the United States has been building freeways at an unprecedented rate. Host Michael Guillen takes us on a chariot ride through Ancient Rome and discovers that many of the highway amenities date back over 2000 years.

Reverence for the number three dates back thousands of years, and can still be found today in art, architecture, science, literature and religion. What is it about this number that continues to fascinate mankind?

In a world devoid of people, pythons begin to challenge alligators for control of the Everglades. Elsewhere, Shanghai sinks under the weight of its empty skyscrapers.

Mother Nature continues to wreak havoc: Apocalyptic dust storms suffocate cities around the globe; a tornado chases a family, nearly crushing them; and a volcano erupts almost annihilating the population of the Pacific Northwest.

Marc, Jason and Travis follow the trail back to New York where they discover traces of a shadow government bent on keeping Nikola Tesla's files secret.

The team find evidence from one of Scotland's bloodiest eras as they wade through the waters of the River Garry in the Scottish Highlands, the site of the first major clash between Highland Jacobites and the government army.

Ever since the 1950s, the United States has been building freeways at an unprecedented rate. Host Michael Guillen takes us on a chariot ride through Ancient Rome and discovers that many of the highway amenities date back over 2000 years.

Reverence for the number three dates back thousands of years, and can still be found today in art, architecture, science, literature and religion. What is it about this number that continues to fascinate mankind?

In a world devoid of people, pythons begin to challenge alligators for control of the Everglades. Elsewhere, Shanghai sinks under the weight of its empty skyscrapers.

Mother Nature continues to wreak havoc: Apocalyptic dust storms suffocate cities around the globe; a tornado chases a family, nearly crushing them; and a volcano erupts almost annihilating the population of the Pacific Northwest.

Marc, Jason and Travis follow the trail back to New York where they discover traces of a shadow government bent on keeping Nikola Tesla's files secret.

The team find evidence from one of Scotland's bloodiest eras as they wade through the waters of the River Garry in the Scottish Highlands, the site of the first major clash between Highland Jacobites and the government army.

The Universe

How did life evolve on Earth? What will life look like on other planets? These and other questions will be answered by a diverse group of scientists. Watch as experiments are done to see if life exists on earth-like planets beyond our solar system.

Ever since the 1950s, the United States has been building freeways at an unprecedented rate. Host Michael Guillen takes us on a chariot ride through Ancient Rome and discovers that many of the highway amenities date back over 2000 years.

Reverence for the number three dates back thousands of years, and can still be found today in art, architecture, science, literature and religion. What is it about this number that continues to fascinate mankind?

In a world devoid of people, pythons begin to challenge alligators for control of the Everglades. Elsewhere, Shanghai sinks under the weight of its empty skyscrapers.

Mother Nature continues to wreak havoc: Apocalyptic dust storms suffocate cities around the globe; a tornado chases a family, nearly crushing them; and a volcano erupts almost annihilating the population of the Pacific Northwest.

Marc, Jason and Travis follow the trail back to New York where they discover traces of a shadow government bent on keeping Nikola Tesla's files secret.

Rick and Beau tackle the mighty River Ouse in Yorkshire, hunting for evidence of Britain’s most notorious sea-faring raiders - the Vikings. With a find potentially dating to the 11th Century battle, it’s a river hunt of epic proportions.

The Universe

Jets of high-energy light are propelled into space and can emit intense radiation for years. Astronomers believe this creates the building blocks of planets, people and plants. The Supernova hunters look at recorded supernovas throughout time.

A look at how certain weapons invented by the ancient Chinese have contributed to nearly every military weapon in use today.

Throughout the ancient world, magic was used for everything from healing to communicating with the gods. But did magic really exist in the ancient times as a means of replicating the power of the gods?