Among the endless stars and galaxies whizzing through the black vastness of space, it may seem impossible that there is no life out there somewhere.
So, where is it?
A scientist at Imperial College London says that alien life could be much closer than we think – and that we could find it in the next "decades or two".
It is provided in a new document, which was selected for publication in the Journal of the British Interplanetary Society.
"Until recently, detecting signs of life elsewhere has been so challenging as to seem almost impossible, but new observational insights and other developments mean that signs of life elsewhere could be realistically discovered over the next ten years," wrote David Clements .
The crux of the matter is something called "Paradox of Fermi". Designed for the first time by Enrico Fermi in the 50s, the paradox is reduced to this: it seems that life must be out there. But it is not. So where the hell is it?
Scientists have been struggling with this problem for years. The Drake equation, a famous mathematical formula for estimating the number of probably intelligent civilizations, seems to suggest that intelligent life should be everywhere. In fact, for humans to be alone in the universe would be a 10 billion trillion possibility, according to scientist Adam Frank, according to NASA.
There have been many theories – some extravagant, some practices – about why the paradox exists, according to The Atlantic. Maybe it just is not life, and incredibly thin odds have made us incredibly lucky. Perhaps life is out there, but it is not intelligent: they are small insects or single-celled creatures.
On a more chilling level, perhaps there is intelligent life but it is deliberately silent. Perhaps they are silently observing us (the "zoo" hypothesis), or they do not believe it is worth worrying or afraid of colonization. Perhaps they existed but now they are dead.
This last, grim hypothesis is known as the "Great Filter," which suggests that at some point in the evolution of civilization, a kind of catastrophe erases them before they can make contact, as reported by the ; Australian Broadcasting Corp.
In his article, Clements is less pessimistic. He believes life may be common – but he is trapped in miles under water under the thick icy shells that surround the moons in our solar system.
It is believed that some moons around gaseous giants like Jupiter are filled with such water, deep beneath a thinking ice crust, writes Clements – and that it could be a life-sustaining habitat.
He writes that since scientists have already found distant planets that might have similar moons, it could be that the underwater life of the moon is "in fact the dominant home for life in the Galaxy, with life on terrestrial terrestrial planets, being exception rather than the rule. "
They may even have developed a high intelligence or technology, he said, according to Newsweek.
"Intelligent sub-glacial life would certainly be very different, but I did not see any evidence that would have been impossible, in fact, the skills of the octopuses … are quite surprising.The technology in an aquatic environment, if developed, could be very different. from what we are familiar with, "he said, according to the magazine.
"We are left with the rather chilling prospect that the galaxy can be full of life, but that any intelligence within it is locked up under impenetrable ice barriers, unable to communicate, or even understand the existence of, the. external universe "Clements writes in his article.
That is, unless we can find out.