Are we already found alien life?

"Small part of the Cydonia region, taken by the Viking 1 orbiter and released by NASA/JPL on July 25, 1976". (Wikipedia/https://en.wikipedia.org/wiki/Cydonia_(Mars))

Some researchers suggest that maybe we already found alien life or evidence of even intelligent lifeforms. But we judged them false too quickly. And then, if the falsification happens too fast, it's hard to change the testimony. But the fact is that the evidence of the suspected ancient Matian lifeforms is not found very often. 

And that is evidence that supports and denies the hypothesis about ancient primitive lifeforms on the red planet. The suspected bacteria fossils on a meteorite found in Antarctica look like cyanobacteria. So their origin can be on Earth. 

Somebody says that we already found evidence of intelligent life. In some theories, the "face of Mars" are created by nanomachines that can imitate things that they see. And some other people think that the famous image that is found in Wikipedia is from some underwater platform. 

Image 2) "Electron microscopy revealed chain structures resembling living organisms in meteorite fragment ALH84001" (Wikipedia/Allan Hills 84001) ALH84001 means Allan Hills 84001)

When we think about the Viking experiments in the 1970s there were some incoherences in samples that Viking landers analyzed during their operational time. That thing caused suspicion that there could be some primitive lifeforms on Mars. But then all those pieces of evidence were falsified. And after that, there has been some kind of discussions about the messages or signals captured by the SETI program. 

There was evidence that are against and supporting the theory that those BLC 1 and Wow!-signals were artificial. And the best thing that supports that theory is that those signals happened only once. The BLC 1 came from the direction of Proxima Centauri, but the origin of that signal is unknown. 

The Proxima Centauri's direction doesn't mean that signal comes from Proxima Centauri. There is also a yellow, sun-type star in another direction where the "Wow! signal could" come. The distance to that star is over 3000 ly. 

But why we are overcritical? Why is all evidence that are supporting life on other planets denied? The thing is that some people are thinking that "little green men" are a joke. We always forget that genetic engineering can make it possible that even humans can have green skin. Green skin can have chlorophyll in its cells.

And that allows the skin of the creature can create the same sugars as vegetables. So are the "little green men" some kind of joke? The thing is that genetic engineering can hybridize vegetables and humans. And that thing causes interesting thoughts in my mind. 

https://bigthink.com/hard-science/alien-life-false-positives/

https://en.wikipedia.org/wiki/Allan_Hills_84001

https://en.wikipedia.org/wiki/BLC1

https://en.wikipedia.org/wiki/Cydonia_(Mars)

https://en.wikipedia.org/wiki/Viking_program

https://en.wikipedia.org/wiki/Wow!_signal

New Earth-mass exoplanet found near red dwarf.

"Artist’s conception of a rocky Earth-mass exoplanet like Wolf 1069 b orbiting a red dwarf star. If the planet had retained its atmosphere, chances are high that it would feature liquid water and habitable conditions over a wide area of its dayside. Credit: NASA/Ames Research Center/Daniel Rutter" (ScitechDaily.com/Astronomers Discover Earth-Size Planet – Promising Target in the Search for Alien Life)

The new exoplanet Wolf 1069 b is a giant Earth-mass rocky planet. The new exoplanet orbits red dwarf Wolf 1069 in the habitable zone. The location of Wolf 1069 is in the Cygnus constellation. The surface temperature of that star is 3158±54K or 2884,85±54C. 

That means this M5 spectral class red dwarf is a very small, and cold object if we compare it with the Sun. And, its solar system is also small. 

The distance between Earth and Wolf 1069 is 31.229 ly. So, it's quite near to us. The exoplanet trajectory fits in Mercury's trajectory. If we want to compare that Wolf 1069 system with our solar system. But the star is much colder than the sun. And that means the shell of that planet is not melting to lava. 

And that means there could be liquid water. The planet itself is locked. So there are no similar lifeforms that exist on Earth. The problem is that the dayside of those locked planets is extremely hot.  

The nightside of locked exoplanets is very cold.  Powerful winds are blowing on its surface. And those winds are stabilizing temperature on locked planets. That means that liquid water is possible on those planets.

Many other variables determine if liquid water is possible. The one thing is the atmosphere. First, the planet must have an atmosphere where liquid water can exist on it. 

Then the gravitational field's strength must be right. If the gravitational field is too strong it pulls water to ice. If the gravitational field is too weak. Water boils in low temperatures. 

So if the planet's gravitational field is strong, water can stay liquid on hotter planets. But that means the planet must stay closer to its star than a weak gravitational planet. 

Same way weak gravity means that the melting point of water is lower. That means on the planets which gravitational fields water can stay liquid in a lower atmosphere. 

Water itself doesn't guarantee that the planet can host life. If the chemical environment doesn't contain elements that amino acids include the lifeforms cannot form on that planet.  Also if water boils at a low temperature that can affect the ability to form proteins. High temperatures can also affect the ability to form complicated molecules. The terms "lifeforms" and "intelligent lifeforms" are not synonyms. 

Things like amoebas and diatoms are life forms. But they are not intelligent lifeforms. Intelligent lifeforms require time to advance. An intelligent lifeform doesn't mean. That it can build rockets and airplanes immediately. 

Culture and technology require time to develop. And, of course, species require motivation to create technology. So even if some planet hosts intelligent lifeforms, those lifeforms would not necessarily have the technology. So, technically advanced lifeforms and intelligent lifeforms are not synonyms either. 

By the way, if we are thinking about intelligent creatures that could live on locked planets. Those creatures must live in the nightside of those planets. That means those creatures would have big eyes. And they would like to be in the night rather than dayside. So that is one remarkable thought that so-called "grey men" are forming in my mind.

Living at night or in low-level light requires big eyes. And those creatures would be very sensitive to sunlight. 

https://scitechdaily.com/astronomers-discover-earth-size-planet-promising-target-in-the-search-for-alien-life/

https://en.wikipedia.org/wiki/Wolf_1069

https://astronomyandtechnology.blogspot.com/