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?

From 1939 until 1945, more than fifty nations engaged in harrowing combat--and during that time, a number of intriguing and persistent mysteries were born.

There's nothing more fascinating than a code that can't be cracked. If history's unbreakable codes can be deciphered...could we unlock answers to some of the greatest mysteries of both the past and present?

There are many puzzling artifacts from around the world that challenge everything we know about the technological capabilities of our distant ancestors.

Are bizarre afflictions merely fabrications of the mind? Or could they arise from unseen forces that are beyond our comprehension?

There are many bizarre tales involving U.S. Presidents that defy explanation and are shrouded in mystery.

Is it possible that the Vikings 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.

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?

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?