The mysterious drone sightings that captured national attention were a classic case of mass hysteria.

The Tully Monster, an ancient creature at the top of the scale of weirdness, has defied scientists’ attempts to categorize it for more than half a century. But a new analysis of the molecules in its fossils suggests it was a vertebrate.

The discovery of as many as six bodies in two cars in a lake could explain disappearances from 1960s and 1970.

Construction workers eat their lunches atop a steel beam 800 feet above ground, at the building site of the RCA Building in Rockefeller Center in New York, Sept. 29, 1932.

Jonathan Creek is a British mystery series produced by the BBC and written by David Renwick. Primarily a crime drama, the show is also peppered with broadly comic touches. It stars Alan Davies as the title character, who works as a creative consultant to a magician while also solving seemingly supernatural mysteries through his talent for logical deduction and knowledge of illusionism.

For months, curators at a British museum had been wondering how an ancient Egyptian statue in a sealed display cabinet had been able to rotate on its glass shelf, seemingly of its own

Bertha, the world's largest tunneling machine, churning through the rock and mud beneath Seattle, has hit a mysterious roadblock—so mysterious, it is only known for now as "the object."

Underwater archaeologists have found human bones at the bottom of a Maya cenote in Mexico.

Our world is full of things no one can explain, from mysterious ancient artifacts to really, really basic stuff we totally should have figured out by now. But once in a while, we do find an answer to one of these fascinating mysteries, and that answer is "just plain old stupid bullshit." Here are four intriguing questions that should've remained unanswered (or just four unnecessarily elaborate cover-ups that prove the government has a sense of whimsy).

Got a Big Foot or space alien in your backyard? Government agents in black helicopters? Sheepsquatch? Just call Jack Cary, founder and director of the Paranormal Intelligence Agency

It's the most baffling and enigmatic mystery on the Internet with promises of epiphany if you solve it. But just how hard is it to crack the Cicada...

The disappearance of Malaysia Airlines Flight 370 is not the first airborne drama that has raised more questions than answers. Did the jet disintegrate on its own? Did a bomb blow it up? Was it hijacked? For now, the answers are lost at sea. Here are some of the biggest past mysteries involving plane crashes and disappearances

A mysterious illness has killed at least 23 people in southern Guinea in six weeks, but the disease has yet to be positively identified, the health ministry announced Thursday.

Beginning of late 2013, a number of strange suicides amongst professionals in the banking and finance around the world was noted by the press. They speculated on why these bankers committed suicide and whether or not it is an epidemic. CNN recently released an article alluding to the stressful condition modern day bankers, as a potential factor. Whatever the case may be, it is still an astonishing fact that workers of the banking and finance are dieing strange deaths all around the world.

A mysterious set of hovering lights in the back woods of Mississippi has given UFO conspiracists further fuel to flame their theories. Edith and Rainer Shattles set up infrared cameras in their fields hoping to spot some deer, but when they checked on the footage the next morning they got quite a fright.

The collection of 445 selfies — all featuring the same man — is entitled Four Hundred and Forty-Five Portraits of a Man. The photographs were purchased at an auction in New York and put on display at the Zimmerli Art Museum at Rutgers University.

Police in Oslo have released photos of a man found wandering aimlessly in the city in December, having apparently suffered total amnesia, in the hope that someone from his past life will recognize him.

A mysterious duck-like sound recorded in the ocean around Antarctica has baffled scientists for decades, but the source of the sound has finally been found, researchers say.

'Webdriver Torso' has uploaded more than 77,000 cryptic videos. Are they connected to espionage, or even aliens – or is the answer more mundane?

The Internet was abuzz this morning over a cryptic tweet sent by the National Security Agency’s careers account, which looked like (1) a particularly bad pocket tweet, (2) the latest from Rakesh Agrawal, or (3) a coded message containing national secrets/spy instructions/something else out of the FX drama “The Americans.”