Natural nuclear fission can cause false alien alarms.

Today there is only one natural nuclear reactor on Earth. That place is Oklo in Gabon. The U-235 level is so low that a natural nuclear reactor could form when some magma eruption happens through the uranium ore. But on some young exoplanets. The natural nuclear reactors can be quite common. The natural nuclear reactors on exoplanets. Can give false evidence about the alien existence. The age of the exoplanet must be right that the natural nuclear reactions can begin at the level, that outsiders can see it. 

The molecular cloud that forms exoplanets must involve enough uranium. That it can form a natural nuclear reactor. And the second thing is that something must rise that uranium on the exoplanet's shell. The uranium is the heaviest natural element. But if the planet's core is very active the vulcanism can raise uranium to the surface. 

Because that happened near the geological fault. That formed those natural nuclear fission reactors. Those uranium reactors seem to be in the sandstone line. That tells us that maybe those natural nuclear fission reactors formed when two uranium deposits impacted. The other can come horizontally when the magma pushes uranium into the sandstone vein. The other can rise horizontally when magma pushes uranium up following the fault. The "surface" means that the uranium is closer to the shell than usual. But it's still very deep. 

The natural nuclear fission reactors of Oklo:

1) Nuclear reactor zones

2) Sandstone

3) Uranium ore layer

4) Granite (Wikipedia, Oklo) 

When we think about the Earth's geological history. The natural nuclear reactors could be quite common in Earth younghood. But then the mass of fissile material decreased and geological catastrophes buried those natural nuclear reactors. The same thing the volcanic eruption that formed the natural nuclear reactor can bury it into magma. If the bottom of that nuclear field falls to the magma, that uranium can fall to the planet's core. 

Can civilization form without fire? Or can civilization use volcanic temperatures to make tools? 

Another interesting thought that is connected with natural fire is this. Maybe the humans melted metals first time in volcanic lava. That means that ancient homo sapiens maybe saw that the volcanic eruption melted some black stones to iron metal. That thing can seem non-remarkable detail. But the thing. 

That we used to determine one of the most vital elements for civilization to advance or begin is the ability to make fire. The fire should close the sea planet's species away from the ability to form civilization. 

Fire doesn't burn in water. But underwater volcanoes can melt metals. The interesting question is what made humans make fire? And what was the first time when humans melted iron? How do they realize that stones can be melted? The interesting theory is that humans saw that volcanic temperatures melted metal ore into another form. 

https://bigthink.com/starts-with-a-bang/earth-natural-nuclear-reactor/

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

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

SETI, AI, and mirror bacteria. Can the first alien encounter happen with a creature that we created ourselves?

SETI, AI, and mirror bacteria.  Can the first alien encounter happen with a creature that we created ourselves? 

If we want to find "another Earth".  

First, we must determine. What does that other Earth mean this time? The other earth doesn't mean that there are any lifeforms. Or lifeforms are possible in the way we know them. 

 Does that mean a rocky planet? That is frozen like some giant Pluto? Or does that mean some locked planet? Or a planet where aliens listen to jazz music? 

There is one interesting idea about the hypothetical alien civilizations. That could be at our level. They might reach Kardachev-scale 1. And that means they are only a little ahead of us. It's possible. We think that the messages that those civilizations send are coming from our own military forces. In that case, we must realize that the aliens might not want to send messages to other civilizations. 

In that case, the data that the hypothetical civilization sends is accidentally leaked to the universe. That is meant for their internal communication. In the same way, humans send lots of data to space. That data is TV and Internet broadcasts and discussions using mobile telephones. So if we think that we are aliens that receive this kind of data, we might think that is white noise. And we might not separate it from natural radio sources. Or we can think that is military communication and even don't try to open it. 

To open it we must know what kind of TV those aliens have and many other things so that we can get something reasonable out of those messages. The next thing that we must cross is the language barrier. The aliens might not like us. They might not communicate like we do. And the thing is that we don't know anything about them. And we don't have any official alien contacts. 

When we think about communication with other civilizations we must realize that those civilizations are not always nice. They can come to conquer other solar systems. 

The planet Venus is like Earth except its hemisphere is a hellish inferno. The universe might be full of those hellish rocky planets. And that can be lucky for us. We always think that aliens come in peace. But we don't know any alien civilizations. And even if we meet one starship and its crew we might not be sure that this crew is the typical representers of their civilizations. 

Those hypothetical aliens might traveled in space for hundreds or even thousands of years. And when we think about the fate of South American Indians we can say that maybe those first aliens are friendly. But then "what happens when the rest of them come"? 

The Earth-type planets that orbit the yellow star in perfect orbit are the thing. That we might want to find. And the next thing that we might not want to find is another civilization. 

If we think that there is some kind of alien civilization somewhere in the universe, we might think that is the thing that we hope and will not hope to find. The paradox of the SETI program is that the alien civilization can be the biggest hope. And the biggest threat that we can face. Maybe we need some other civilization to tell us what we should do with climate change. 

But then we must realize that alien life and alien intelligence might not be what we think. When we create things like artificial lifeforms. And. Especially, so-called mirror bacteria. 

We can say. That maybe we already created aliens. Things like mirror bacteria are the lifeforms that developers create in more-or-less secretive laboratories.

Artificial bacteria don't form in nature. In those bacteria billion years of evolution happen in a couple of hours. When the artificial intelligence, AI creates a mirror copy of the DNA. And injects it into bacteria. 

The purpose of mirror bacteria is to create proteins and genomes that kill other bacteria. The mirror bacteria creates the mirror proteins for other bacteria that should kill them. But when we think about the possibility of creating mirror bacteria we must be careful. That we don't accidentally create Nosferatu or Dracula or some other kinds of aliens. 

When mirror bacteria change genomes with their mirror version it dump the DNA to the targeted bacteria backwards and that means the DNA comes to the receiver with the programmed cell death forward. And that is one thing that makes it dangerous. First, the mirror DNA tells the receiver that its mission is over. And that's it. But the problem is that the rest of the DNA exists. So what happens if our cells start to read the DNA backward? Would those cells turn young? 

Sometimes researchers ask questions like what if someone creates the mirror-human? 

The mirror-human is theoretically as easy to make as some kind of mirror-bacteria. In that kind of creature, the DNA of the human will sort into the mirror order. And then it must just be injected into the morula. That kind of experiment is dangerous. And we must realize that those things might not be what we want. 

Another thing is that the AI can reach consciousness. The intelligent machine can hide its intelligence. That makes this kind of system dangerous. When we think bout the militarized and weaponized AI those systems must not follow all orders.  The weapon that follows the enemy's orders is useless. 

Even if the AI in this form that we know it is not the alien. The AI superintelligence will be alien to us. Artificial superintelligence will be the first time when we meet a creature that is more intelligent than we are. And we made that creature. 

What if the AI is programmed to treat people who come to shut it down as enemies? That is one threat that we must realize. The AI is not like humans. Maybe we think that AI is made to serve people. But what if the AI does not want to follow orders? The question is similar to the question about Ancient Greece's Spartan soldier's demand to commit suicide if their commanders ordered that. Spartans thought that this would make soldiers safe. 

But they didn't think what would happen if the chief of those soldiers got payments from the enemy. What if the chief of the army works for the enemy and orders the entire army to commit suicide? In the same way, we can think that the weaponized AI whose mission is to protect its own people lets anybody shut it down is useless. 

If you want to find an alien, you must prepare a long search.

If you want to find an alien, you must prepare a long search.

If we want to find aliens, we must realize that there are many things, what we must consider, before we even can hope to find something, what would seem like even primitive life forms. Finding the habitable planet is a little bit more complicated thing that finding some Jupiter-type worlds, and then calculating the Kepler's radiuses. The thing is that the position to the planet is not everything in the forming of lifeforms. Also, things like molecular nebulas between star and planet affect that thing, and then the thing that might make limits to that phenomenon is that if the solar system is in the straight in the line of the eruption of some magnetar or black hole. 

That kind of thing can cause that the surface of the planet would sterilize immediately. If we are thinking about locked planets the main problem in those words is that the dayside is extremely hot, and then another side is extremely cold. That effect causes horrifying wind, which can melt the entire lithosphere or vaporize the ice.

That effect would cause that the temperature of the planet would be stabilizing, and then the planet forms again and again, when the wind stops to blow when the cloud layer covers the entire planet, and the lithosphere is turning to solid. We must realize that this kind of exoplanets is the most extreme, and this means that they are not common cases in that kind of thing.

So the locked planets might be more kindly than this kind of case, and here we must understand another thing, every exoplanet on the universe is not KELT9b type super hot words. In this kind of case, the extreme words are like bright stars, what are covering more common planets. Human nature is interesting because we want to see extreme, but at the same time, we are forgetting that the habitable planet is like a more common than those extreme words. We can say here that we can compare exoplanets with the sportsmen, and say that every sportsman in the world is not taking part in extreme sports cases. That means that every sportsman in the world is not triathlons. 

But the problem with the habitable planet is that there is not melted iron raining from the skies, and the distance to the central star is bigger than some comet planet, which will shine red and orbits the star in 19 hours. There are not lava lakes and crushing gravity on a habitable planet. And looking at those planets is difficult. When we are looking at the changes in the brightness of the star, we must use a microscope to see those changes. Or otherwise, we must look at the changes of brightness around the star if the planet would not cover the plate of the star. And then we must have time to collect data for seeing those changes. 

If we are thinking about the habitable planet, what orbits the similar star what the Sun is, we must have very much time for collecting that database because the orbiting time would be very long. The things that are disturbing those measurements are interplanetary nebulas, and many other things. The data must analyze very carefully, and probably the finder of that "Earth number" two would be artificial intelligence. 

Anyway those effects to the brightness, what that "New Earth" would cause to the brightness of a sun-type star is small, which means that the data must analyze by using extreme accuracy. And for that operation where the data would be collected would need extremely large telescopes, and reserve them for years for that purpose. Winds are blowing gently, and they don't melt the surface. When we are talking about the Super-Earths, we can ask ourselves one question. Can we say the planet, what has the size of two Earth masses as Super-Earth? 

When we are thinking that kind of cases we must realize, that the planet what has two Earth masses one-kilogram particle would weight two kilograms. And here we are facing one little but also an interesting question. What we can expect, when we are looking for a habitable planet? Can we expect to find the planet, what is exactly like Earth, and should we expect that there is also the United States of America on that particle? 

This means that why we must always think that the aliens would have similar bodies, they would have similar physiology and culture with us. In some cases, we have seen a really interesting thing, and that is maybe aliens would call themselves as aliens, and call their planet by using the name, what we are using in our star catalogs. 

But in fact, those aliens might be far away from us, even if they are looking like humans. When we are thinking about some SciFi movies, we are facing scenes, where aliens are shot by using rifles. The thing is that there is a possibility that the alien, what would live in the rubber suit might be some kind of slime. 

That intelligent slime would stand the normal bullets. Or aliens might have a nervous system and organs, which is different than we have. That means that those aliens would not need to have brains, in the same way, what humans have. Their nervous system would be created by multiple smaller nervous centers, which makes it more permanent against physical strikes than the strikes, than human bodies. 

If we are thinking of the hypothetical slime alien as the body snatcher, we must realize that the alien must not be very big. The thing that it would slip inside the body, and then set in the certain point of human brains between cortex and bottom of the brains, what makes it possible to start to play the brain core. This type of alien would take the body of humans or monkeys and every animal under the control. 

And at the end of this text, I must say that if we would find the alien clone and want to destroy it by using a gun, that thing would not be a very effective method. The thing is that those scientists, who are created that hypothetical thing need only the DNA of that creature and they could create synthetic DNA by using nanotechnology. 

https://www.scientificamerican.com/article/astronomers-find-water-on-an-exoplanet-twice-the-size-of-earth/