One of the popular topics in amateur science over the past few years has been the concept of Alternative Realities. People freaked out when scientists proposed the theory of multiple dimensions. That pales in comparison to the concept of an unlimited number of Alternative Realities or Parallel Universes. They can give you complicated calculations to prove their concept, but I prefer to think of it this way … Have you ever thought you misplaced something like keys or a wallet that you always store in the same place each day; only to find it back there a short time later? Have friends, relatives or co-workers swore they saw you and may have even talked to you some place that you were no where near at the time? These are examples how some postulate that Alternative Realities cross over and impact our lives.
In olden times people would say that if you were not a forgetful person and found things missing around the house you might be sharing your domicile with mischievous fairies. If people saw you somewhere you were nowhere near they might say you have a doppelgänger. Scientists despise using the paranormal or supernatural to explain anything, so it makes sense that they would offer the idea of Alternative Realities as a more scientific and realistic explanation. Their concept says that we can exist in many Realities at the same time. They claim that sometimes realities cross over and intermingle.
The interesting part of their hypothesis is that you might be different in each reality, or exist in our reality and not in others. They point to instances such as a person who landed on a commercial flight from Europe in the 1950s. He had a passport, drivers license and other documents from a country that does not exist in our reality. YouTube is loaded with videos of cars or people coming out of nowhere. With the number of cameras everywhere these days it's no surprise that any odd or unusual events might be captured on video. Ultimate conspiracy lovers say we all live in a Matrix type situation and call such incidents glitches in the matrix. I think I like the Alternative Realities explanation better.
The Twilight Zone TV Show featured an episode about a World War One pilot who landed at a modern airport. It was based on a real event when a British Flyer saw an airfield as it would look later. There was also an episode involving a commercial flight that landed with no passengers or crew on board. An investigator arrived to look into it. The aircraft and investigator disappeared leaving only one person who remembered the event. Over the years there have been stories of "ghost planes" landing with no one on board and others that landed years after they took off.
Supporters of the theory that Alternative Realities are intruding on ours point to the "Mandela Effect". It's named after the once prisoner and more recently President of South Africa. Some people are certain that they recall Nelson Mandela dying in prison in the 1980s. Others are not sure. Then there are the movies. People swear that iconic lines like "I'm walkin 'here" were once "I'm crossin' here". I've had my own experience with this. I clearly remember an elderly couple living a few houses away and across our street. No one else remembers them, not even my immediate family. I suppose you could account for some UFO sightings, ghost activity and other seemingly paranormal happenings by using the Alternative Realities theory to explain them. I am not convinced of that at present.
Now astronomers have chimed in with what they say is proof that we are living in a Multiverse instead of just.one Universe. The Multiverse theory saws that an infinite number of Universes exist next to each other in parallel. That includes ours. They believe these can be as different as they are the same. OK, now I have a headache! Astronomers say the discovery of a massive, Super Void Cold Spot supports the Parallel Universes theory which is supported by several scientific heavyweights like the late Dr. Stephen Hawking. They saw the cold spot should not exist as it does because it does not fit into any of the existing models that help explain our reality. My headache just got worse. In the end I guess we have to wait until we are walking down a street one day and run into ourselves.