Do you believe there are aliens? Recently, Chinese academician Wu Xiangping discussed a topic of interest to adults and children - "aliens" in the "2022 New Year's Speech of the Chinese Academy of Sciences", and announced that he believes in the existence of aliens.
Since human discovery that the earth is only a tiny speck of dust in the universe, the debate about aliens has not stopped, and every time a UFO event occurs, everyone argues fiercely, of course, the key photos and videos of UFOs are blurred every time, without exception, can not become ironclad evidence of aliens.
One side of the argument argues that aliens exist on the grounds that the 120,000-light-year Milky Way galaxy has hundreds of billions of star systems, and that of so many super-Earths, there is always one that gives birth to life, not to mention that the Milky Way is just a drop in the ocean in the universe.
The other side of the debate believes that aliens do not exist, and the reason is obvious, if humans still need to develop 1 million years to build faster-than-light spaceships, then aliens only need to evolve 1 million years earlier than human beings on Earth, then they should have faster-than-light spaceships now, why haven't they visited Earth yet?
So let's take stock of the interesting UFO events in 2021, why they can't be ironclad evidence of alien visits to Earth.
For example, in December 2021, some Hong Kong citizens reported seeing a silver-gray "UFO", but instead saw it in three days in three areas: An Tai Cuo, Victoria Harbour and Kowloon Bay in Kwun Tong.
According to villagers, the UFO was an irregular rectangle, vertically downward, glowing orange-yellow, hovering for about 10 minutes and then flying away, with some citizens taking blurry videos as evidence.
Just in January 2021, a rectangular luminous object was also found over the Leeward Oahu Island in Honorulu, Hawaii, but in the darkness of the night, the luminous object shone with a blue glow, did not hover like a Hong Kong UFO, but landed vertically, and finally fell into the sea and disappeared.
Even more bizarre is the UFO incident that U.S. officials waited until May 2021 to expose, saying that on July 15, 2019, a U.S. military warship encountered a UFO while patrolling the coast of San Diego, and the two crew members saw it with their own eyes and filmed the video.
According to the video footage, a huge ellipsoid hovered in the sky for a long time, and then "controlled" flew into the sea, stirring up a splash of water several meters high, why use the word "controlled"? Because the ellipsoid in the sky first hovered, and then suddenly changed its trajectory and flew to the sea.
See? People shoot pictures of UFOs, one blurrier than the other, no wonder some people say that at the critical moment, blurred, so of course, these can not become ironclad evidence of the existence of aliens.
In 2021, some "UFOs" are actually not UFOs at all, because clear-eyed people know what it is at a glance, but some people still think that it is alien technology.
For example, in March 2021, the West Coast of the United States suddenly flashed a group of dazzling fireballs, moving from west to east, not as fast as meteors, flying in the sky for tens of seconds, the four western states of the United States have witnessed it with their own eyes, it is precisely because there is no meteor fast, some people think that it is alien technology, in fact, these fireballs are just fragments of the American Falcon 9 rocket to return to Earth.
It can be seen that even if there are more UFO incidents, it cannot be confirmed that aliens visit the earth, which is some "false evidence" that cannot withstand scientific verification.
In the science fiction novel "Three-Body Problem" created by Liu Cixin, the three-body people who exceeded human civilization constantly created trouble in human science experiments in order to hinder the progress of human science, resulting in the suicide of many scientists, but in the real world, the plot in "Three-body" is now impossible to stage.
However, this does not mean that aliens do not exist, at the 2022 New Year's Speech of the Chinese Academy of Sciences, Academician Wu Xiangping also hinted that a star that may have aliens, which is about 4.2 light-years away from The Earth, because humans once received a radio wave with a frequency of 982 megahertz, which is consistent with the frequency of mobile phones and excludes human interference.
Proxima Centauri is the closest star to the Solar System, with a much smaller mass than the Sun, about 4.85 billion years old, and due to the slow thermonuclear reaction, its lifespan can reach hundreds of billions of years, which is several times the lifespan of the Sun.
Of course, even if Proxima Centauri does have aliens, aliens can't be on the star, but on a planet orbiting the star, because Proxima Centauri also has a companion star, Proxima B, which has a mass of about 1.3 times earth and is located in the habitable zone, and perhaps the signal we receive comes from Proxima B.
Since aliens may exist, why haven't they visited Earth? I have gathered the opinions of experts, which can be roughly divided into three aspects.
First, a few years ago, astronomers discovered that the solar system is at the end of a cosmic network, surrounded by voids. The universe is so vast and boundless that it is not conducive to aliens discovering us, which is similar to a remote mountain village located in the middle of the mountains, which is difficult to find.
In 2018, astronomers said that the super Earth 55 Cancri e, which is 40 light years away, is 8.7 times the mass of the Earth, even if there is intelligent life, it is difficult to leave the planet, because gravity is huge, and each launch requires 400,000 tons of chemical fuel, which is not conducive to the development of spaceflight.
Third, interstellar space is filled with powerful cosmic rays that can destroy any form of life, which is equivalent to establishing a natural cosmic barrier that separates each star system, so that aliens cannot visit Earth.
Such an analysis leads to the conclusion that the existence of aliens is extremely likely, but everything depends on the evidence, the existence of aliens still requires the unremitting efforts of scientists to explore, and finally, do you believe that there are aliens? Interesting and informative scientific content, please pay attention to the only WeChat public account: Interesting Exploration