In early May 2014, the image of a strange bright blue hole in the clouds in the sky of Northern California – USA made the whole world curious.

According to many people at the time, the cloud with a bright hole could be a UFO (unidentified flying object) or caused by aliens.

Others, more realistically, see the phenomenon as just a warning sign of bad weather.

Recently, another hypothesis has been put forward and received a lot of attention from scientists: is it the “time hole”?

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So what is a “time hole”?

The first theory of the “time hole” is the theory of time standing still . Accordingly, the physical world after entering the “time gap” means disappearing, and coming out from there also means being recreated.

Thus, the “time gap” and the earth are not the same system, and the time in the “hole” is relatively static. Therefore, even if they go missing for 3-5 or a few decades, people will not change from the beginning.

The second hypothesis put forward is the Retrograde Time Theory , which holds that time in the “time gap” is backwards compared to normal.

The missing person after falling into it is likely to return to the past. However, when time is turned back again, the person is transported back to the time they went missing, resulting in a mystical re-occurrence.

The third theory that is currently the most widely accepted is the Time Closure Theory . According to this theory, a “time gap” is a phenomenon that exists objectively in the physical world, neither visible nor palpable.

As for the physical world in which humans exist, it is both closed and open. Sometimes when it opens once, a missing phenomenon occurs as a result. Open one more time, the missing person reappears.

However, up to now, there has not been a theory that is completely convincing because there has not been any solid evidence. The phenomenon of “missing – reappearing” is still a mystery waiting for people to discover.