Are the so called UFOs the work of earthlings?

1 Orphans of prehistoric civilizations on Earth, related to the Great Western Continent.

2 from the Milky Way. Their vehicles have traveled across our galaxy, visiting a series of living spheres within the galaxy, and consider Earth's civilization to be at the 'lower average' level among the civilizations of the galaxy. Vehicles from the Milky Way represent extraterrestrial civilizations that are higher than Earth's civilizations, and their crews are more willing to stay on Earth for a long time and come into contact with Earthlings.

3 from our universe. The universe in which earthlings live is not infinitely extended. This universe has a certain scope and contains an infinite number of intelligent civilizations.

Compared to most civilizations, Earth's civilization is very small and low-level. There are some extremely advanced civilizations, large and small, who have landed on Earth and have had contact with earthlings, but not often, because those civilizations regard earthlings as low-level animals.

4 Twin universes and many other universes. Vehicles from the twin universe and other universes are sometimes hidden and appearing, sometimes large and sometimes small, and their shapes are changeable, which is not easy for ordinary earthlings to observe. Most of these vehicles come and go, only occasionally passing close to Earth as they travel through space.

Unidentified Flying Objects (UFOs) have not yet been conclusive. After all, space is vast, and according to today's astronomical observations, the stars around the solar system that can have a similar environment to the earth are quite far away, and there are no vehicles that theoretically exceed the speed of light, so the chance of aliens visiting the earth is extremely small. Most of the common UFOs are special light and shadow weather phenomena or artificial objects (such as satellites, rockets and other aircraft wreckage).

I don't dare say what you saw, but aliens do exist, and my friend has had contact with them and learned something about it, just because he told it to the outside world and took what he learned out to discuss it with the university professors, and to this day he is considered a psychopath.

UFO stands for Unidentified Flying Object, which means UFO in Chinese, also known as UFO, which refers to an object of unknown origin, unknown space, unknown structure, unknown nature, but floating and flying in the air or space.

The term UFO originated from the U.S. Air Force's "Blue Book Project", whose first director was Captain Edward Rupert, who officially invented the term "UFO" (literally translated as UFO) to replace the inaccurate and suggestive term "flying saucer" used at the time. UFOs are recorded in the ancient European book of Ezekiel, and in ancient China, UFOs were also called Xingcha.