Mysteries! Well these are the cases that are till now never solved and is possible that might not be ever solved.
So I present to you some of the world's greatest mysteries that need to be solved.
MH370 vanished on 8 March 2014 with 239 people – mostly Chinese nationals – on board, during a routine flight from Kuala Lumpur in Malaysia to Beijing.
Its disappearance prompted one of the biggest search missions in history, yet a four-year multimillion-dollar joint operation by Australian, Malaysian and Chinese investigators failed to find any sign of the plane.
What happened to flight MH370 has become one of the world’s greatest aviation mysteries till date.
The Bermuda Triangle (sometimes also referred to as the Devil's Triangle) is a stretch of the Atlantic Ocean bordered by a line from Florida to the islands of Bermuda, to Puerto Rico and then back to Florida. It is one of the biggest mysteries of our time - that perhaps isn't really a mystery.
Why do ships and planes seem to go missing in the region? Some authors suggested it may be due to a strange magnetic anomaly that affects compass readings (in fact they claim Columbus noted this when he sailed through the area in 1492). Others theorize that methane eruptions from the ocean floor may suddenly be turning the sea into a froth that can't support a ship's weight so it sinks (though there is no evidence of this type of thing happening in the Triangle for the past 15,000 years). Several books have gone as far as conjecturing that the disappearances are due to an intelligent, technologically advanced race living in space or under the sea.
But the real reason why ships & planes go missing remains mystery till date!
Chances are, you’ve experienced this situation, known as déjà vu, during your life. Déjà vu (French for “already seen”) occurs in approximately 60 to 80 percent of people—a phenomenon that’s almost always fleeting and may manifest at any time. Despite widespread coverage, bursts of déjà vu are still not understood by the scientific community.
“Because there is no clear, identifiable stimulus that elicits a déjà vu experience (it is a retrospective report from an individual), it is very difficult to study déjà vu in a laboratory,” says Michelle Hook, assistant professor in the department of neuroscience and experimental therapeutics at the Texas A&M Health Science Center College of Medicine.
“According to many studies, approximately two-thirds of individuals have experienced at least one episode of déjà vu in their life,” Hook says. “Understanding how memory storage works may shed some light on why some experience it more than others.”

The City of Atlantis has been imagined as the crowning city of Neptune, where mermaids and mermen live. But based on what Plato has discussed during his time, specifically with his two dialogues Timaeus and Critias, it specifically mentioned the existence of Atlantis based on the stories being heard during the journeys, and how Atlantis was in its prime state, thus giving a clue that the place did exist as Plato was a real entity. Now that it sunk into the deep, many are still wondering if it is real, knowing that there are certain objects underwater that may be the remnants of this once beautiful city.

is not uncommon for bodies to wash up on beaches but for one beach in British Columbia severed feet have consistently been floating ashore for the past several years causing numerous theories to be put forth.

When Jerry R. Ehman worked under the SETI Project of the Ohio Wesleyan University’s Perkins Observatory, he did not expect that he would be able to pick up a radio frequency supposedly coming from deep space. He was able to get a 72-second signal from the constellation Sagittarius and was never able to get it agai,n. Up to this day, no one is sure about the origin of the signal. It derived its name, however, from the “wow!” that Jerry wrote in the margin of the printout.
When DB Cooper hijacked a Boeing 727 along with $200,000, he proceeded to jump out of the plane with a parachute. He was never found, however, and this remains the only unsolved case in US aviation history.

What happened to SS Ourang Medan or “Man from Medan” in Malaysia is perhaps one of the most fascinating and mind-boggling mysteries that ever existed in seafaring history. Everything began with an SOS message in 1947 that mentioned the captain, along with the rest of the crew, was dead. What’s worse, even the telegrapher died during the transmission of the message. When the Silver Star was able to receive the distress call and went to inspect the ship, they confirmed the deaths of all aboard. Speculations of ghosts, hazardous chemicals, and even aliens have been raised, but there is still no conclusion as to what actually happened.