After decades of space-related research and space missions, there is a some-what hard to explain fact concerning it. We have yet to find a form of life on other planets. Don’t Aliens exist, after all?
This problem was first stated by Italian astronomer Enrico Fermi in the fifties and for that, it is known as the Fermi Paradox. If life is so abundant, why have we heard from anyone?
There are some possible answers to this very serious question. The first and most obvious one is that the space is way too big for us to be able communicate across it. A habitable planet may be too many light years away for us to be able to establish communication via electromagnetic radiation, which the only possible way we can do it.
Second, we may not have searched for aliens enough. We have only searched through a few telescope arrays. This year a new fund towards this goal was initiated, that will use two very powerful radio telescopes to continue the search and it will be the best chance yet.
Another explanation that will not be good for our self esteem is that we are just too primitive in comparison to other forms of life existing in space, in order for us to find them. Alien civilisations may be trying to contact us in ways that we are too immature to understand and the communication falls through. But what can we do?
Lastly, there is always the chance that we are just truly alone. Knowing that the Earth is at the exaclty right distance from the Sun for life to evolve, it may just be that such circumstances do not exist anywhere else.