Host Josh Bernstein investigates why the Mayans built thousands of pyramids. He travels from Mexico to Guatemala to discover a secret world.

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.

A former U.S. Navy radar operator emerges from the shadows to reveal the terrifying day it rained UFOs. U.S. Navy personnel unveil new details including an explanation of why UFOs are sighted over oceans.

Stories of civilisations large and small disappearing without a trace can be found throughout history and across the globe.

For centuries, this mysterious civilisation ruled a huge territory across South and Central America. But by 900 AD, it dramatically fell apart.

The ancient world was home to some of the most sophisticated ships the world has ever seen, including Viking longboats and the infamous pleasure boats of Caligula. These cruisers were centuries ahead of their time, but which was the most advanced?

Hunt for the truth about the 1980s arcade game that's been linked to MK-Ultra, and join the search for a lost nuclear bomb. Plus, is Lake Michigan the final resting place for millions of dollars in stolen Confederate gold?

Host Brad Meltzer and viewers are on the hunt for lost and stolen history, including JFK's actual brain tissue and millions of dollars of gold coins stolen from the U.S. Mint. Plus, a remarkable violin from the Titanic.

Host Josh Bernstein investigates why the Mayans built thousands of pyramids. He travels from Mexico to Guatemala to discover a secret world.

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.

A former U.S. Navy radar operator emerges from the shadows to reveal the terrifying day it rained UFOs. U.S. Navy personnel unveil new details including an explanation of why UFOs are sighted over oceans.

Stories of civilisations large and small disappearing without a trace can be found throughout history and across the globe.

For centuries, this mysterious civilisation ruled a huge territory across South and Central America. But by 900 AD, it dramatically fell apart.

The ancient world was home to some of the most sophisticated ships the world has ever seen, including Viking longboats and the infamous pleasure boats of Caligula. These cruisers were centuries ahead of their time, but which was the most advanced?

Hunt for the truth about the 1980s arcade game that's been linked to MK-Ultra, and join the search for a lost nuclear bomb. Plus, is Lake Michigan the final resting place for millions of dollars in stolen Confederate gold?

Brad Meltzer and viewers are on the hunt for lost history. Among the missing: actual lunar rocks brought back from the moon by American astronauts during the Apollo space program - and later stolen from NASA headquarters in a daring heist.

One of the Bible's most sacred treasures, the Ark of the Covenant, has tantalised adventurers for centuries. Can explorer Josh Bernstein discover its fate?

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.

The list of military eyewitnesses describing strange and threatening unidentified craft in U.S airspace is growing. And now, a U.S. Navy radar operator has provided something more: actual coordinates where UFOS appeared and disappeared.

The Civil War nearly destroyed the great experiment known as the United States of America, but is it possible that the preservation of the republic was influenced by extraterrestrial beings?

When Hurricane Katrina hit, parts of New Orleans were devastated. Do the answers to protecting the city from global warming lie in its historical underworld?

The Bible is one of the most influential books ever written. But through translations and censorship, has its truth been compromised?

Iceland is the largest and most fearsome volcanic island on the planet. Its volcanoes have caused climatic chaos and devastation across the planet, a fate which may one day happen again.

Brad Meltzer and viewers are on the hunt for lost history. Among the missing: actual lunar rocks brought back from the moon by American astronauts during the Apollo space program - and later stolen from NASA headquarters in a daring heist.

One of the Bible's most sacred treasures, the Ark of the Covenant, has tantalised adventurers for centuries. Can explorer Josh Bernstein discover its fate?

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.

The list of military eyewitnesses describing strange and threatening unidentified craft in U.S airspace is growing. And now, a U.S. Navy radar operator has provided something more: actual coordinates where UFOS appeared and disappeared.

The Civil War nearly destroyed the great experiment known as the United States of America, but is it possible that the preservation of the republic was influenced by extraterrestrial beings?

When Hurricane Katrina hit, parts of New Orleans were devastated. Do the answers to protecting the city from global warming lie in its historical underworld?

The Bible is one of the most influential books ever written. But through translations and censorship, has its truth been compromised?

Iceland is the largest and most fearsome volcanic island on the planet. Its volcanoes have caused climatic chaos and devastation across the planet, a fate which may one day happen again.

Brad Meltzer and viewers are on the hunt for lost history. Among the missing: actual lunar rocks brought back from the moon by American astronauts during the Apollo space program - and later stolen from NASA headquarters in a daring heist.