They've been discovered at Roman-era sites, but no one knows what they're for. By Tom Metcalfe.

A man died after he burst into flames on a street in Hull, England, on Wednesday, two weeks after London police issued a plea for witnesses of another similar incident. Daniel Lingwood, a resident of Hull, looked out of his window to see flames across the road, according to a local newspaper. He immediately rushed outside to help the victim, who has not been named.

A forensic linguist from The University of Manchester who analysed letters supposedly signed by Jack the Ripper has concluded that two of the most famous examples were written by the same person. The Whitechapel murders that terrorised London in 1888 are still remembered thanks to the legend of Jack the Ripper, who was never caught.

In the last eight years, 15 human feet have washed up on the shore. By Stacy Conradt.

A group of researchers believes Amelia Earhart made several attempts to reach civilization in her final days — and that her messages got through.

While there was no actual disappearance of schoolgirls at Hanging Rock either around the turn of the century or in the 19-teens when Lindsay attended Clyde School, there was a traumatic disappearance in Lindsay’s near future when she wrote her manuscript: none other than the cutting of her final chapter, with its beauty and strangeness and its mathematical-physical musings. By Eric Wargo.

Selika Lazevski exists in six photographs and nowhere else. She was a black Amazon in Belle Epoque Paris, a horsewoman without a horse. By Susanna Forrest.

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.”

Putting fear into the heart of the bravest sailor, the Bermuda Triangle has been claiming lives for centuries. Find out more about the sinister patch of ocean with these 10 weird facts.

Has the Zodiac killer been found? Author claims it was his father, Earl Van Best, Jr.

As Edward and Rebecca Cummings passed the town of Center Ossipee, N.H., in their new 1926 Franklin sedan, it began to snow. They left their home in Cambridge, Mass., hours before, driving a car with high seats, no defroster and a top speed of about 50. Rebecca took over the driving for the last part of the trip to their summer place at Silver Lake.

The security firm Symantec has uncovered a malware campaign from a group dubbed Dragonfly that allowed remote access to the computer systems of more than a thousand power plants. According to Symantec, the attackers used the malware only to spy on system operations, but could have used the remote-access functionality to wreak considerably more havok had they decided to.

A mysterious giant hole spotted in northern Siberia has sparked an urgent expedition. Aerial images posted on YouTube indicate a hole up to 80m wide in Yamal, a peninsula jutting into Arctic waters whose name translates as "the end of the world".

Mars Unidentified Flying Object “Again” By Famous “Streetcap1″ – 14 July 2014

In July 2010, amid the gargantuan rebuilding effort at the site of the World Trade Center in Lower Manhattan, construction workers halted the backhoes when they uncovered something unexpected just south of where the Twin Towers once stood.

Astronomers have a mystery on their hands. Two large radio telescopes, on opposite sides of the planet, have detected very brief, very powerful bursts of radio waves. Right now, astronomers have no idea what's causing these bursts or where they're coming from. And nothing has been ruled out at the moment — not even the kind of outrageous claims you'd expect to see in tabloid headlines.

Researchers investigating a mysterious hole in the remote Siberian tundra might be busy over the next few weeks.

In July 2010, amid the gargantuan rebuilding effort at the site of the World Trade Center in Lower Manhattan, construction workers halted the backhoes when they uncovered something unexpected just south of where the Twin Towers once stood.