From ancient skeletons, to mysterious space phenomena, sit back and dive deep into some of history's most confounding cases.

Leonardo da Vinci: the most famous, most admired of all painters. Yet, the man himself remains elusive. Old accounts describe someone too handsome, too strong, too perfect to be accurate. Then, a chance discovery takes the art world by storm. Could it be an unknown self-portrait by da Vinci?

Leonardo da Vinci is an iconic painter, yet the man himself has remained elusive. Then, a chance discovery takes the art world by storm. Could it be his self-portrait?

Leonardo: The Mystery of the Lost Portrait

Homicide detective Rod Demery and scientist Professor Turi King investigate history’s most intriguing murders to find long-lost killers.

Unearthed: Ancient Murder Mysteries

Over the past few decades, significant discoveries have been made on the very site where the pyramids were built. Authentic archaeological experiments have been filmed in real-time, revealing ancient techniques and methods, unlocking certain secrets of these ancient great builders.

Significant discoveries have been made on the very site where the pyramids were built. Authentic archaeological experiments have been filmed in real-time.

Pyramids Builders: New Clues

Deep in the mountains of West Virginia, the Green Bank Observatory has been receiving a mysterious signal from deep space. Could this be a message from an advanced civilization, or is it a much stranger and violent occurrence? Visit the largest steerable radio telescope on the planet for answers.

Deep in the mountains of West Virginia, the Green Bank Observatory has been receiving a mysterious signal from deep space.

Mystery Signal from Space

In July 1799, during the French Campaign in Egypt and Syria, the French soldiers of lieutenant Bouchard discover by chance at Rosetta a large black stone. It is, in fact, the fragment of a stele engraved in honor of King Ptolemy V, including three writing systems: Greek, Demotic, and hieroglyphs.

In July 1799, during the French Campaign in Egypt and Syria, the French soldiers of lieutenant Bouchard discover by chance at Rosetta a large black stone.

Champollion: Unravelling the Mysteries of the Stone

Is it possible that there is a hidden planet within our own solar system? New evidence suggests that the fabled Planet X, or Planet 9, may indeed exist… but where? Meet the teams racing to discover and redefine our planetary neighborhood.

Is it possible that there is a hidden planet within our own solar system? New evidence suggests that the fabled Planet X, or Planet 9, may indeed exist… but where?

Search for Our Sun's Lost Planet

Cracking the Code reveals the greatest codes known to humanity and the brilliant minds that crack them…

Cracking the Code

Inside the Mind of a Con Artist unearths the human truths behind some of the most extraordinary cases in con artistry.

Inside The Mind Of A Con Artist

This drama-doc series takes you back in time to the most shocking and surprising murder cases in history.

Murder Maps (Season 1)

Murder Maps (Season 2)

Murder Maps (Season 3)

Murder Maps (Season 4)

Murder Maps (Season 5)

Small errors in the construction of buildings and vehicles can lead to a disaster.

What Went Wrong

Throughout history some of the world's most amazing works of art have disappeared, this series attempts to uncover them.

Raider Of The Lost Art (Season 1)

Raider Of The Lost Art (Season 2)

In the coming decades, we will unveil the universe's greatest mystery: life beyond Earth. This film explores future missions to Mars and discoveries beyond Earth.

Life in Outer Space

Humanity is closer than ever before to a perpetual clean power source after a team of scientists at Lawrence Livermore National Laboratory successfully produced a nuclear fusion reaction resulting in a net energy gain. We now know one thing is possible, we can reach ignition.

Humanity is closer than ever before to a perpetual clean power source.

Fusion: Harnessing the Power of Stars

Photographer Harry Burton’s images of the Tutankhamun excavation created a global sensation in the 1920s and are still studied by Egyptologists today. Explore the spectacular locations where he worked and discover why Burton’s photographs inspired a craze for Egyptian designs.

Photographer Harry Burton’s images of the Tutankhamun excavation created a global sensation in the 1920s. Discover why his King Tut photographs are still studied today.

The Man Who Shot Tutankhamun

Explore the mystery behind JFK's assassination through first-hand accounts, expert analysis and newly-released government documents.

JFK: The Final Evidence

A worldwide investigation into the bizarre vanishing of Bitcoin’s mega-billionaire creator, the secretive “Satoshi Nakamoto.” Why did the man—and it appears it was indeed a man—disappear only 26 months after releasing Bitcoin to the world on January 3, 2009?

A worldwide investigation into the bizarre vanishing of Bitcoin’s creator, the secretive “Satoshi Nakamoto.” Why did he disappear only 26 months after releasing Bitcoin?

Searching for Satoshi

Who were the Celts? Mystical druids from the British Isles, or gruesome, barbaric warriors? Evidence in the European Alps shows that they were an advanced, 3,000-year-old civilization. Now, another Celtic puzzle inside an ancient tomb: the mysterious remains of an aristocratic woman and two men.

Were the Celts mystical druids from the British Isles, or barbaric warriors? New evidence shows a 3,000-year-old civilization—and mysterious remains in an ancient tomb.