Life could have come to Earth from space: alien octopuses
People who are looking for traces of alien civilizations on Earth often imagine some kind of caricature humanoids with a huge head, reptilian green scales and a huge ego that requires total domination of the human race. But who said that real aliens should conform to our cultural stereotypes?
In a new article, scientists develop the hypothesis that octopuses and other cephalopods originate from other planets, and crazy asteroids brought eggs and eggs to their distant ancestors many thousands of years ago. It is worth noting that the hypothesis of panspermia, that is, the origin of life from the outside, is not new in itself. Her supporters suggest that living organisms or the genetic material from which life later formed could somehow be moved not only from one planet of the solar system to another, but even fly from other stellar systems.
As evidence, a number of structural features of terrestrial organisms are usually given. For example, life forms are known (some bacteria, fungi and the famous tardigrades), which can survive for a long time in a vacuum. The experiment conducted at the ISS proved that even after a long stay in outer space, many microbial colonies not only survived, but also felt quite comfortable - and many others, apparently, will be able to transfer the journey in space even better. In fact, the survivability of microorganisms in outer space has become such a big problem for NASA (and even for Roskosmos) that the agency has special services that monitor the sterility of spacecraft sent to space - scientists are afraid to accidentally bring biomaterial to other planets and thereby violate the purity of the experiment, mistaken for an alien life of ordinary terrestrial microbes.
Shards of other worlds
In addition, as we all know, between planets and other celestial bodies there is a periodic exchange of substances. On Earth there is a collection of rocks from Mars: no spaceship brought them from the Red Planet, they just came to us naturally. Apparently, at some point, asteroids knocked out several pieces of the Martian rock from the soil, and they went to drift into space until they were pulled by the gravity of our planet.
Thus, all that is needed for bacteria that do not need oxygen to get from one planet to another is just a fairly large piece of stone and a little luck. Yes, most organics simply burn out in the atmosphere, but there is always a small chance that some microbes can survive. Knowing how unpretentious the lower forms of life are, it is likely that they will be able to multiply and colonize new territory even in aggressive environmental conditions.
Of course, all this does not mean that cephalopods are aliens from outer space. Most likely, they evolved in the process of evolution in the same way as all other species, and their strange appearance is primarily due to the conditions of the environment in which they live. But in a broader sense, the theory of panspermia can neither be proved nor disproved - scientists just have to continue to explore the cosmos and hope sooner or later to find traces of the life of alien organisms in it.