The Fermi Paradox

- ... But ... Where is everybody?

It was Enrico Fermi, the famous nuclear physicist who formulated this well-known question!

In the summer of 1950, at Los Alamos National Laboratory in New Mexico, he was going to lunch with his colleagues, Emil Konopinski, Edward Teller and Herbert York and they had a casual conversation about extraterrestrial intelligent life.

After sitting down for lunch, and when the conversation had already moved on to other topics, Fermi suddenly blurted out, "Where is everybody?" (Teller's letter), or "Don't you ever wonder where everybody is?" (York's letter), or "But where is everybody?" (Konopinski's letter).

A great number of arguments indicate that there should be a plethora of intelligent, technologically advanced civilizations in the Universe!

• There are billions of stars in the Milky Way similar to the Sun.
• With high probability, some of these stars have Earth-like planets in a circumstellar habitable zone.
• Many of these stars, and hence their planets, are much older than the Sun. If the Earth is typical, some may have developed intelligent life long ago.
• Some of these civilizations may have developed interstellar travel, a step humans are investigating now.
• Even at the slow pace of currently envisioned interstellar travel, the Milky Way galaxy could be completely traversed in a few million years.
• Since many of the stars similar to the Sun are billions of years older, Earth should have already been visited by extraterrestrial civilizations, or at least their probes.
• However, there is no convincing evidence that this has happened!

(source: Wikipedia, Fermi paradox)

There have been many attempts to explain the paradox, some of them are presented in this picture:

What do you think, members of the Club of the Space?

Well,i actually think that at there Planet they're thinking the same as us.Why haven't we seen any alien yet.We're alien to them and they're alien to us, maybe they're asking the same question.But i believe when space tech is better and we can go ffurther into space.We will find them one day long time for us but just a short time to Universe and it's spreading time.

So each year the way to there planet is longer and longer.

Yes, that is one of the explanations: There are other planets with intelligent life, but all of them are too young, in relative infancy - we had no chance to observe them yet, they had no chance to observe them yet!

After all, Guglielmo Marconi built his first successful radio transmitter and receiver in December 1894 - it was 128 years ago. That primitive signal could only reach those stars that are 128 light-years from us and that is really a small part of the Milky Way.

Only if they are in another galaxy...

You see, space is expanding, but only the empty space between the galaxies. The space within our Milky Way is not expanding!

In my opinion, there are advanced, intelligent, benevolent civilizations, far, far more advanced than we are. They are monitoring us, well cloaked, awaiting the moment when we have successfully solved all our problems here on Earth: pollution, climate change, over-population, poverty, wars, etc. Unfortunately, that moment seems so far away!

There are better Radio now and there's a better telescope too. If human and that inhuman species is born in the same time maybe we can see each other at the same time too.After all *Who knows?* it's still a Mystery.

If you say that they're more advanced, intelegent and far more advanced than I  absolutely agree with that theory.If they're monitoring us should i say *Is the world war are a plan of alien?Did Hitler and other president is controlled by alien?Are they alien and war is the test for us ? Are we human on Earth is just a *Guinea pig to them?* and if we pass the test they will give us a better tech as we're worthy to take it? What an interesting topic but the answer to it will not be soon or in our lifetime i think.

Yeah, I agree with you completely... Each and every scenario is possible!