Jellyfish is one of the oldest living creatures on Earth to this day, presumably surviving for at least 500 million years, even longer than the dinosaurs, floating around in the ocean, with its long tentacles swimming like an alien.
There are more than 200 species of jellyfish in the world's oceans, distributed in waters around the world, and their bodies contain 98% water, without brains, hearts or bones. In addition to water, the jellyfish body is protein and fat, because the water content is too large, so we see that the jellyfish are transparent, and the muscles are integrated with the surrounding water environment.
Some scientists have proposed that jellyfish are actually the most interesting argument for life from extraterrestrial origins. An expert who studies the origin of the nervous system on Earth, while studying jellyfish, found that his nerves are made up of a completely different set of molecular elements, unlike any other animal on Earth, and it is more like a completely different design.
In a sense, the jellyfish has an alien nervous system, 540 million years ago in the Cambrian Period, when the famous Explosion of Life on Earth occurred. The fossil record shows that the vast majority of animals appeared during this period, and many invertebrates were born, including jellyfish.
Many biologists believe that the explosion of life was by no means natural, speculating that it was likely that a huge comet hit Earth, first causing the mass extinction of most of the life on Earth, and then the comet is not an ordinary comet, it carries cells, organisms and virus genes from outer space. Although it caused a mass extinction of life on earth, it also triggered a new round of life explosion, which is the so-called destruction to have rebirth.
So jellyfish, including invertebrate organisms, may have been cellular life in outer space at that time, came to Earth, slowly evolved into the current appearance on Earth, and even survived to the present. The claim that jellyfish evolved from aliens, not earth, is quite interesting
In the 1990s, NASA successfully sent 2487 jellyfish into space. In order to study the gravity-free and radiation environment in space, it will not affect the way jellyfish reproduce, these jellyfish are packed into bags containing artificial seawater. In order for the jellyfish to operate normally in a gravity-free environment, they added some chemicals to the bag. Final experimental results proved that jellyfish can still operate normally in this environment, and normal reproduction, even more exaggerated reproduction.
In the end, these 2487 jellyfish in space turned out to be a large family of 60,000 jellyfish, which was basically the growth of a big explosion. But when they returned to Earth, the 60,000 jellyfish underwent subtle changes, they gradually dizzy, could not distinguish the direction of the situation, could not accurately determine the direction, and could only crash around like headless flies. In the 1990s, the project was originally designed to study jellyfish.
In various environments in space, whether to affect the results of experiments on reproduction, but unexpectedly found that jellyfish became more free after the environment of outer space, as if this is its original home, and the number of reproduction actually exploded, and after returning to the earth, there was a serious discomfort, which reminded people of the previously mentioned jellyfish is actually from an alien. But we know that jellyfish are still living creatures in water, moving by water currents, and there is no such medium in space.
In summary, jellyfish exist on the earth for hundreds of millions of years, jellyfish may not only be what we generally know, the ocean may not be the most suitable environment for it, its secrets need to be explored by more scientists in the future.