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Some secrets are destined to remain in the shadows forever... Join us as we explore baffling enigmas from the modern era that continue to elude explanation! From David Berglas's impossible card trick to the vanishing of Jimmy Hoffa, these mysteries have stumped experts for decades. Which unsolved puzzle fascinates you the most? Let us know in the comments!
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00:00We have faith that someone, somehow, somewhere, can help us locate our father.
00:06Welcome to WatchMojo, and today we're taking a look at 10 mysteries that have baffled humans since the year 1900 that will likely never be solved.
00:14A camera shows the submarine disappearing under the water's surface.
00:19Quarter feet!
00:21The world's greatest card trick.
00:23David Berglas was a mentalist and magician who gained notoriety in the 1950s, particularly for his iconic trick known as the Berglas effect.
00:31This particular card effect is a version of a classic plot in magic called Any Card at Any Number.
00:37For this deceptively simple feat, Berglas would produce a seemingly ordinary deck and ask a spectator to name any playing card.
00:45Another person would then pick a random number from 1 to 52.
00:48By the time the cards were dealt one by one, the specified card would be found at the specified position.
00:54It's a trick that stumped and astounded other magicians for years.
00:57Which made him a legend amongst magicians and a career that spanned over six decades.
01:03However, Berglas maintained that it was unteachable, and he took the secret to his grave in 2023.
01:09This covert technique is now widely considered the holy grail of card magic.
01:14Tesla's missing papers.
01:15It's just amazing from a history standpoint, Tesla helped create the foundation of our electrical grid.
01:23History buffs may know about the rivalry between Nikola Tesla and Thomas Edison in the nascent days of electrical power.
01:29But did you know that after his death in 1943, some of Tesla's research mysteriously disappeared?
01:35Tesla was allegedly working on particle beam weapons that, if successful, could have altered the outcome of World War II.
01:41The day after his death, his nephew, the Yugoslavian ambassador to the U.S., discovered that his notebook and many crucial documents were missing.
01:50As the FBI didn't trust Tesla's nephew with his sensitive research, they later confiscated all of the scientists' items.
01:56The U.S. government sat on Tesla's entire estate for 10 years.
02:01Although some of Tesla's work was returned to his family years later, a significant portion of it has never been found.
02:08Havana Syndrome
02:08It is a mysterious illness that's affected U.S. diplomats worldwide, attacking the nervous system, and in some cases, forcing people into early retirement.
02:18Since 2016, U.S. diplomats and intelligence officers from postings around the world, starting with Cuba, have reported mysterious symptoms.
02:26This combination of dizziness, headaches, and cognitive issues has since been dubbed Havana Syndrome.
02:31Soon after, diplomats and other government workers stationed around the world began experiencing similar unexplained symptoms.
02:38The true cause remains elusive.
02:40Some experts suggest mass psychogenic illness, where stress and fear manifest as physical symptoms.
02:46Others propose environmental factors like exposure to pesticides or malfunctioning surveillance equipment.
02:51A 2022 report by the director of National Intelligence offered mixed findings.
02:56It found that pulsed electromagnetic energy and ultrasound were plausible causes for some cases, while psychogenic factors could explain others.
03:04Despite extensive investigations, no definitive cause has been identified.
03:08New technology is helping us more quickly and thoroughly evaluate a variety of potential causes of these incidents, and we've distributed across posts so that we can respond rapidly to new reports.
03:19Letters of last resort
03:20This is the stuff that spy movies are made of.
03:23Belonging to the United Kingdom, the letters of last resort are exclusively written by the newly appointed prime minister.
03:30Four different letters are penned, which are then given to four submarines, equipped with destructive Trident missiles.
03:36Within the letters are instructions telling the commanding officers what to do in the event of a nuclear strike on Britain.
03:42No one but the prime minister knows the exact contents of the letters, as they're kept sealed until nuclear war breaks out.
03:49In the event that nuclear war doesn't break out, which thankfully it hasn't, the letters are destroyed upon the inauguration of a new PM.
03:57The origins of HIV-AIDS.
04:00Some nurses feared this unknown, unnamed disease so much they wouldn't even go near someone with AIDS.
04:06The fear was pervasive.
04:07While HIV is largely linked to the 1980s, it remains a global public health issue.
04:13In 2020 alone, it was estimated that nearly 40 million people were living with the disease.
04:1870% live in sub-Saharan Africa, but antiretroviral drugs offer hope.
04:25New infections are down by over a third.
04:28Mother-to-child transmission has more than halved, and globally there's been a 35% decrease in deaths.
04:34But regardless of its prevalence and very public history, there is still a lot about the retrovirus we don't know.
04:40Even those of us who were in it from day one were shocked by the enormity of the problem.
04:48For example, humanity is still mostly unsure of where it came from.
04:52The leading theory is that African hunters in the early 20th century killed and ate chimpanzees infected with SIV.
04:59The S standing for simian, which then mutated into HIV in the human body.
05:05However, this information is typically populated with words like probably and likely,
05:10indicating that the origins of HIV are not definitively known, even to this day.
05:16Metro 2
05:16You may have heard about the British shadow cabinet, but have you heard of a Russian shadow subway?
05:22Rumors have swirled for almost a century about Metro 2,
05:25a secret subway running parallel to the Moscow metro, codenamed D6 by the KGB.
05:31This clandestine network was allegedly built during the rule of Joseph Stalin.
05:35It lacks public entrances, but could be used as a shelter in the event of an aerial assault on Moscow.
05:40In times of crisis, while panicked civilians crowd onto the public metro,
05:44government officials could easily escape the city using the trains in Metro 2,
05:48which are supposedly battery-powered.
05:50Despite widespread speculation, the Russian government has never acknowledged the system's existence,
05:56nor officially released any details of its function.
06:00What happened to Jimmy Hoffa?
06:01And jubilant Jimmy Hoffa sweeps in as new president of the Teamsters.
06:05Jimmy Hoffa's disappearance is the mafia mystery that just won't die.
06:10On July 30th, 1975, the former Teamsters boss vanished from a Detroit parking lot.
06:15Was he meeting with mobsters?
06:17Did he live happily ever after?
06:19Definitely not.
06:19Tracking Hoffa's downfall takes you through a web of corruption, betrayal, and in the end, murder.
06:25Hoffa was officially declared dead in 1982, but no body was ever found.
06:30Over the years, rumors of his fate have circulated.
06:34Some claimed he was buried in one of a series of strange locations.
06:37Others say he was dissolved in acid or encased in cement.
06:40The FBI has conducted countless searches, including one as recently as 2022.
06:46So the FBI dug in the wrong place?
06:47They dug in the wrong place.
06:50They dug in the wrong place.
06:51Hoffa remains missing.
06:53With his mob ties and countless enemies, it's likely we'll never know the full truth.
06:58The USA's missile submarines.
07:00There's something about submarines and secrecy.
07:03The United States owns various missile submarines that are guided by nuclear power,
07:08including the USS Ohio, Michigan, Florida, and Georgia.
07:11Still very secret, well-guarded.
07:15It's dark, and it's massive.
07:18It's as long as the Washington Monument is high.
07:22Nearly the length of two football fields.
07:24The sail, as it's called, stretches high into the air.
07:27These are known as SSGNs.
07:29The missiles on board these subs have the potential to cause great destruction.
07:33But their whereabouts and activities are generally unknown.
07:38Unlike a surfer ship that someone can see or a satellite they don't know we're here.
07:45However, they literally surface from time to time.
07:47For example, Michigan appeared in South Korea in 2017,
07:51and Florida took part in Operation Odyssey Dawn in Libya.
07:54During the Cold War, the USS Florida prowled the oceans,
07:58equipped with Trident nuclear missiles,
08:01ready to carry out an attack at a moment's notice.
08:04On June 28, 2010, a rare event occurred,
08:07which saw three of four surfacing at once in response to Chinese missile tests.
08:12These four subs have been SSGNs since the 2000s,
08:15but most of their actions and locations have remained a secret.
08:19We won't go any further,
08:20but you're literally standing 10 to 20 feet from an operational nuclear reactor right now.
08:26Area 51
08:26Take my word for it.
08:28There's no Area 51.
08:29There's no recovered spaceship.
08:32Oh, excuse me, Mr. President.
08:35That's not entirely accurate.
08:39When it comes to highly classified areas,
08:42it doesn't get more famous than Area 51.
08:45Found in the Nevada desert,
08:46Area 51 is a top-secret military facility
08:49with ties to cutting-edge technology.
08:52The military base 80 miles from Las Vegas
08:54has become infamous for conspiracy theories about little green men.
08:58They certainly appear to still be covering up
09:00what exactly goes on at Area 51.
09:03The place is so secretive
09:05that it wasn't officially unveiled by the CIA until 2013,
09:09even though it was very obvious that something was in the desert.
09:13Area 51 is officially known as a military training facility
09:16and supposedly a testing ground for both experimental aircraft and high-tech weaponry.
09:21The Area 51 designation is said to come from Atomic Energy Commission designation maps.
09:27In the 1930s, it was a wildlife reservation under the Department of the Interior,
09:32but the War Department then took it over in 1942 during World War II.
09:37Owing to its secretive nature,
09:39both trespassing and flying over the site are grossly prohibited
09:43and dangerously enforced.
09:45Naturally, this has given rise to a swath of conspiracy theories.
09:50Are aliens inside Area 51?
09:52Perhaps we'll never know.
09:54But because of all this secrecy,
09:56many made up their own minds a long time ago about Area 51,
10:00and that's why it may never lose its extraterrestrial excitement.
10:05Before we continue, be sure to subscribe to our channel
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10:21Bohemian Grove
10:22Bohemian Grove is a compound sitting on a massive 2,700-acre slice of California redwood country.
10:28It's a gentleman's club of sorts,
10:30catering to the conservative elites of American society.
10:33Its membership includes almost every Republican president since Calvin Coolidge,
10:37other politicians,
10:39as well as some of the wealthiest business leaders in modern history.
10:42For over 150 years,
10:44elites have flocked to Bohemian Grove on semi-secret retreats,
10:48which typically take place in mid-July every year,
10:51for about two weeks.
10:52Few know what they do there,
10:54though rumors of their Bacchanalia-esque revelries abound.
10:57What we do know is that there is a reasonable likelihood
11:00that many of the world's historical events may have been shaped
11:03within the confines of the Bohemian Grove.
11:06Do you think you have the answers to any of these burning questions?
11:09Let us know in the comments.
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