Unexplained Phenomena

Theories surrounding the source of the Tunguska blast that rocked the Siberian region in 1908 abound. But the exact cause is still a mystery.

By Diana Brown

When a super-realistic android or video character gives us a creepy feeling, it enters the uncanny valley. Why do we get spooked, and what can we do to avoid it?

By Ed Grabianowski

A key ingredient of horror films, junior-high slumber parties and occult practices, the Ouija board has been fascinating and scaring people for more than a century. But does it really contact the spirit world, or is there a more logical explanation?

By Julia Layton

Hummmmmm. Annoyed yet? Imagine if you heard that sound every night no matter what you did. Likened to a diesel engine idling in the distance, the Hum is a sound some people can never get away from. It's even caused suicide. But is it real?

By Dave Roos

It's a massive book that no one can read, and it has fascinated scientists, historians and cryptographers for decades. Is it a textbook, an encyclopedia ... or an elaborate hoax?

By Nathan Chandler

In 1977, SETI volunteer Jerry Ehman saw a transmission so exciting he circled it on paper and wrote the word "Wow!" It seemed to indicate a message from outer space. But what was it really?

By Dave Roos & Austin Henderson

The mysteries of Stonehenge have captivated us for centuries: Who built it and why? How did they move those giant stones? Though archaeologists and other researchers have replaced old theories with new ideas, many questions remain.

By Jane McGrath

Was Anna Anderson really Anastasia Romanov? Does the Bermuda Triangle really exist? Wonder no more: We have the answers to these and other formerly unsolved mysteries.

By Patrick J. Kiger

A "law of miracles," you say? What, are people going to get fined for practicing miracles without a license? Is there even a certification program for becoming a miracle worker? No, it's a mathematical law?

By Kate Kershner

We humans have no problem dreaming up superpowers we wish we had. There's flight, invincibility and super strength. But what about pyrokinesis or starting fires with our minds? Is that a real-life thing or comic-book fantasy?

By Kate Kershner