Why do not the aliens contact us? Here is the NASA employee response

 Alan Stern,  a planetary scientist and NASA's mission to 'New Horizons', put forward  a new theory about why we still can not communicate with an  extraterrestrial civilization. 

 The fact that science fiction films do not meet the invariable human beings and aliens is now in the limelight of science. 

Alan Stern, an American Aerospace Center (NASA) employee, has come up with a new theory of why human beings still can not communicate with an extraterrestrial civilization.

 Stern, an  American astronomical society's conferance, spoke about the possibility  that it might have developed an underwater civilization, contrary to  what we predicted by aliens. 

 Stern  claimed that extraterrestrial beings could be in the depths of the ocean  in other parts of the galaxy, on the planet they lived on. 

 Many  scientists have identified other possible scenarios that investigate why  this phenomenon, the subject of many filaments, has not yet occurred. 

 There are 40 billion planets resembling our planet. But it may take longer than we think it would be for any developed civilization to contact us. 

 Because the waves traveled by aliens may be slower than we think. 

 We may also be missing these waves because they have a complex structure that we can not notice. 

 Because we have been listening to space since 1984, and this technology can be quite primitive. 

 Also, the waves at 32 light-years from our planet have not reached us yet. When  the size of the universe is taken into consideration, the message of  "first hello" which is moving towards us may still be on the way. 

 If we think  that we send a wave that is a little more than 100 years away, it is  possible to say that our message is still not reaching a civilization. 

 According to the most pessimistic scenario, we might be the only civilization looking for other lives in the environment. 

 Or life on another planet may have destroyed itself before we arrived. If  we think that our planet is under the threat of nuclear war in the Cold  War years, it is quite possible that another civilization will  disappear in a similar way. 

 The worst  scenario is that an advanced civilization, one of Hollywood's most  active issues, continues its development by occupying other  civilizations in its environment. Which makes it quite logical for us not to connect.