Since the dawn of humanity, tales of monstrous creatures lurking in the shadows of our world have sparked both fascination and fear. Today, we often dismiss these accounts as the stuff of myth and legend, but are we overlooking a potentially terrifying reality? With scientists discovering as many as 18,000 new animal species every year, isn't it conceivable that there could be real-life, flesh and blood monsters living among us?

During World War II, a number of persistent mysteries were born, including unexplained stories about everything from lost gold to secret societies and highly advanced technology.

An exploration of the world's most fascinating, strange and inexplicable mysteries. Compelling contributions from scientists, historians, and witnesses as they seek to shed light on how the impossible can happen.

An exploration of the world's most fascinating, strange and inexplicable mysteries. Compelling contributions from scientists, historians, and witnesses as they seek to shed light on how the impossible can happen...

Throughout history, tales of inexplicable maladies to both the body, and the mind, have stirred morbid curiosity and palpable fear. From mysterious wounds that appear for no apparent reason--to a peculiar madness that compels people to dance themselves to death. Are these bizarre afflictions merely fabrications of the mind? Or could they arise from unseen forces that are beyond our comprehension?

The men who've had the honor of being President of the United States are celebrated as esteemed leaders, their names immortalized in the annals of history. But there are many bizarre tales involving U.S. Presidents that defy explanation and are still shrouded in mystery. Could the truth behind these astonishing accounts re-write America's past, and perhaps re-shape its future?

During the Middle Ages, the Vikings were infamous for being a bloodthirsty band of seafaring warriors. But while we're all aware of the Vikings' notorious reputation, historians are learning surprising new things about this Norse society. Is it possible that they were not the savage brutes we think of today--but rather, a highly advanced civilization?

Scattered across the globe lie mysterious ruins that are buried in sand-swept deserts, perched atop towering mountains, and shrouded in the heart of dense jungles. These age-old structures stand as silent sentinels from the past, their true history seemingly erased by time. Can modern archaeology unravel the enigma of how--and why--these wonders were built?

For thousands of years, humanity has been fascinated by the notion that man will one day travel through time. But what if time travel has already taken place? Some of the world's greatest scientists firmly believe that this mind-bending feat is theoretically possible. So, is it really too far-fetched to believe that certain people may have managed to journey through the fabric of time, whether by design... or perhaps, by accident?

Humanity has launched satellites into outer space and submarines to the ocean floor, but the ground below Earth's surface remains shrouded in mystery. Are there profound secrets buried beneath layers of rock, or hidden in vast caves? Can the subterranean world below shed light on humanity's past, or even its future?