The expert was able to “distribute” the form of the average alien.
According to Seth Shostak (Seth Shostak), astronomer from the University SETI (Search for Extraterrestrial Intelligence), unrealistic form of alien sentient life created by the imagination of authors of science fiction movies. Yes, far from a sci-Fi series “Doctor Who” is like, in the words of the scientist, “industrial vacuum cleaners”, and it has nothing to do with reality. Where in the Universe can exist in organisms, whose intelligence is comparable to man, but Shostak is confident that the aliens are more like insects.
Astronomer and physicist Kathleen Ahrens (Ahrens Caitlin) from the University of Arkansas believes that alien creatures can be found on planets orbiting a fairly big stars and are in the “zone of Golden-haired” (the habitable zone) – the region around a star where there may be water in liquid form.
However, there is a probability that life could arise and the worlds more remote from loved stars. For example, Jupiter’s moon Europa and Saturn’s moon Enceladus are outside Golden-haired, but at them is likely to be liquid water under a thick icy crust. Although sunlight is the main source of energy for all life on Earth – do not penetrate into the interior of the oceans, on days, possible hydrothermal vents, similar to “black smokers”.
They bring in the oceans is highly mineralized water, and is suitable habitat for chemosynthetic bacteria that get their energy from redox reactions. Their activity supports the existence of other, more complex organisms, such as crustaceans, snails, crabs, worms, sponges and molluscs.
Arens added that alien beings may not fit the modern view of life. On Earth organisms consist mostly of carbon, but in other worlds they can be from sulfur, silicon, or other elements. They can be all shapes and sizes and not to have the mind.
Douglas Vakoch, President of the program METI (Messaging to Extra-Terrestrial Intelligence) International, specializing in the search for extraterrestrial signals sent by other civilizations, believes that evolution on other planets not on Earth. The development of life and the emergence of new species depends on random events, but that does not mean that it is impossible the appearance of forms resembling earth.
“Sharks and dolphins are similar, although they are very distant relatives: sharks are fish, dolphins are mammals. No wonder such a convergence of body shape when faced with life on other worlds, ” the scientist said.
While various combinations of even similar items can give the multitude of beings that are very different from organisms on Earth. Therefore, Vakoch doesn’t think people will ever encounter similar to his brothers in mind.
The researcher also does not exclude the fact that the oceans on the moons in the Solar system are inhabited. Space probes could detect life there is two ways: to take samples of the water ejected into space by a giant geysers, or to drill many kilometers of ice cap. However, the water on Enceladus is too cold to be able to live there being the greater of the microbe.
Another moon of Saturn, Titan, with a thick atmosphere and seas of liquid carbon on the surface can also be inhabited by primitive life forms. The problem is that on the body there is no water, so metabolism there must be entirely different.
The advantage of Europe is that its under-ice ocean interacts with mineral-rich mantle of the month. Another factor generation into the depths of energy, able to sustain life. Part of this energy is formed by the decay of radioactive elements, with the influence of tidal forces arising from the rotation of the satellite around Jupiter. This is enough for the existence of organisms like the snail. These creatures can survive at low temperatures and high pressure, but unlike their earthly counterparts, must withstand extreme conditions for long periods of time. Vakoch calls these organisms “snail on steroids”.
The scientist believes that real aliens not similar to “gray humanoid”, as they represent the UFO fans and fans of science fiction. To another intelligent life form resembled a human, requires a number of coincidences. Anthropogeny on the Ground included the formation of key niches in the African Savannah. The vertical position of the body of ancient people allowed them to notice predators that lurk in the tall grass. In other circumstances the brain in the upper part of the body – a very questionable advantage. Therefore, the extraterrestrial intelligent beings can be any shape, and have tentacles instead of hands.
See also: Appears new camera, which will study alien life forms
Astrobiology NASA Manically Rocco (Rocco Manicelli) also believes that Enceladus is only possible primitive single-celled life. But liquid water and energy is not the only necessary condition for the development of organisms. Needs restored carbon, nitrogen, phosphorus in sufficient concentrations that they are reacted with each other and formed of biological polymers.
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