Did a cataclysmic event plunge humankind into the period known as the early Dark Ages? Scientists now believe the early Dark Ages may have been triggered by a natural event that occurred around 535 A.D. Science writer David Keys is convinced that the cause was a phenomenon of cataclysmic proportions. At the center of a complex chain of events seems to be "a loud bang" -- a volcanic explosion equal to "two thousand million Hiroshima size bombs." The subsequent environmental calamity, Keys believes, affected human civilization from Mongolia to Constantinople, precipitating plague, famine, death, great migration, the fall of the great Mexican city of Teotihuacan, the Anglo-Saxon victory over the Celts and perhaps even the rise of Islam. (UK / PBS) Released to video (VHS) as a single episode. Run time 1:50.

The story of Rudolph Vrba and Alfred Wetzler, two young Slovak Jews who escaped the Auschwitz death camp. They immediately wrote a detailed account of their experiences resulting in thousands of lives being saved.

Did a cataclysmic event plunge humankind into the period known as the early Dark Ages? Scientists now believe the early Dark Ages may have been triggered by a natural event that occurred around 535 A.D. Science writer David Keys is convinced that the cause was a phenomenon of cataclysmic proportions. At the center of a complex chain of events seems to be "a loud bang" -- a volcanic explosion equal to "two thousand million Hiroshima size bombs." The subsequent environmental calamity, Keys believes, affected human civilization from Mongolia to Constantinople, precipitating plague, famine, death, great migration, the fall of the great Mexican city of Teotihuacan, the Anglo-Saxon victory over the Celts and perhaps even the rise of Islam. (UK / PBS) Released to video (VHS) as a single episode. Run time 1:50.

Days after D-Day, Allied forces joined together for a different kind of mission. Through rare footage, eyewitness testimonies, and real-life accounts, the story is told of the race to capture the German physicists and other scientists and any secrets they may hold of advanced 'vengeance' weapons. Finding the scientists could mean gaining significant advantage in the looming Cold War. Liev Schreiber narrates the story of the scientists' dramatic capture and the influences they have on wars today.

A mining operation in Cerrejon, Northern Colombia reveals a large cache of fossils dating to ten millions years after the KT extinction of the dinosaurs.

Follow an investigation into the centuries-long construction of Notre Dame de Paris, uncovering the vast architectural, technical and human challenges experienced throughout the turbulent history of one of the world’s most celebrated buildings.

Join a team of archaeologists as they examine one of the most significant Viking graves ever found and test the DNA of the remains of the female warrior buried inside, rewriting our understanding of Viking society.

Tanis, Egypt, circa 1939. On the brink of World War II, an excavation team led by French archaeologist Pierre Montet unearthed an intact royal burial chamber containing treasures that rival the riches found in Tutankhamun’s tomb almost two decades before. But while the Tut discovery created an international sensation, the opening of the tomb in Tanis made barely a ripple in a world focused on impending war.

Forensic anthropologists excavate an early American colony of Jamestown, Virginia.

Follow historian James Holland on his quest to understand how the use of amphetamines affected the course of World War II and unleashed the first pharmacological arms race.

On December 3, 1944, The Washington Post published an editorial on the atrocities in Auschwitz with the headline “Genocide,” marking the first time the word appeared in a national newspaper.

500 years ago, Ferdinand Magellan and his crew set sail to gain control of the global spice trade. What resulted was the first circumnavigation of the earth, laying the groundwork for colonization and globalization still felt today.

A decade-long archaeological quest reveals that the oldest stones of Stonehenge originally belonged to a much earlier sacred site – a stone circle built on a rugged, remote hillside in west Wales.

Dr. Kathleen Martinez searches for the lost tomb of Cleopatra. Following her excavations of a 35-meter deep underground shaft in a temple complex in a temple complex dedicated to the ancient Egyptian god Osiris and goddess wife Isis.

A recent archaeological discovery of more than 550 bodies near Mexico City suggests that the Aztecs were much more resistant to the Spanish Conquistadors than previously thought.

In 2009, archaeologists discovered an underwater graveyard of five Roman shipwrecks off the coast of Ventotene, a small Italian island with a notorious past. It was one of the biggest archaeological finds in recent history. The vessels’ well-preserved cargo indicates that these ships did not break up on the island’s rocks, but instead sank to the seabed intact and upright. They were laden with exotic goods including wine, olive oil, and the ancient delicacy garum; a condiment highly prized among ancient Romans. These sunken treasures are providing researchers with insight into the wreck, how the Romans lived, and Ventotene’s intriguing past.

In November 1997, when the skeletal remains of at least 28 bodies were unearthed in the basement of an elegant townhouse, police feared it was the work of a serial killer. But when research indicated the bones actually dated to the mid-1700s, the implications became even more dramatic. This was no ordinary house: 36 Craven Street was the former residence of one of the most important men in American history, Benjamin Franklin. Could the unthinkable be possible? Could one of America’s most iconic figures have been responsible in some way for the bones in the basement?

Scientists investigate the 1962 Alcatraz Escape by bank robbers, Frank Morris and Clarence and John Anglin. Three men who vanished out into the dark waters surrounding the notorious prison island.

What did Vincent Van Goh really do on the night of December 23, 1888?

On October 4, 2011, construction workers were shocked to uncover human remains in an abandoned lot in the Elmhurst neighborhood of Queens, New York. So great was the level of preservation, witnesses first assumed they had stumbled upon a recent homicide. Forensic analysis, however, revealed a remarkably different story. Buried in an elaborate and expensive iron coffin, the body belonged to a young African American woman who died in the first half of the 19th century, before the Civil War and the federal abolishment of slavery. But who was she? Secrets of the Dead: The Woman in the Iron Coffin follows forensic archaeologist Scott Warnasch and a team of historians and scientists as they investigate this woman’s story and the time in which she lived, revealing a vivid picture of what life was like for free African American people in the North.

When it was published in 1610, Galileo’s Sidereus Nuncius (Starry Messenger) set in motion a scientific revolution. Using observations he made of both the earth’s moon and Jupiter’s moons, Galileo proved earth is not the center of the universe. Five hundred and fifty copies of the original treatise were originally printed and roughly 150 are known to exist today. When an original copy with Galileo’s signature and seemingly original watercolor paintings of the phases of the moon believed to be done by Galileo himself came on the market in 2005, Sidereus Nuncius caused a worldwide sensation 400 years after its creation… and again in 2012 when it was proved a fake.

Why did the great airship Hindenburg explode? The disintegration of the Hindenburg in 1937 is one of the most famous disasters of the 20th century. It took more than 100 years to develop what was, in its day, the fastest, most technologically advanced and most luxurious form of transportation in the world -- and 34 seconds to destroy it. The accident that ended the golden age of airships is generally attributed to the ignition of hydrogen gas used for lift. Addison Bain, a retired NASA scientist and hydrogen specialist, sets out on a personal quest of theorizing and experimentation to prove the Hindenburg's real flaw was only skin deep. (UK/PBS 55 min)

Three disparate Capetowners reveal a long-forgotten, dramatic slave ship revolt en route from Madagascar to South Africa. About half of Cape Town's population are descendants of White, Asian, and Black slaves captured by the Dutch East Indies Company from all around the Indian Ocean. After the captives force the surviving crew below deck, a brave Malagasy warrior and a devious Dutch company agent fight a battle of wits with many surprising turns. For some aboard, the journey ends on infamous Robben Island, where Tokyo Sexwale and Nelson Mandela were later imprisoned.

International scientists study and document the ancient royal tombs beneath the ancient Mexican city of Teotihuacán

Researchers working in secret inside a quarry study the charred remains of an English settlement that dates back 3,000 years.