Aliens may be lurking in the oceans, said astronomer Alan Stern

Search for intelligent extraterrestrial life on other planets is a longstanding issue. After decades since the beginning of this research it was proposed several theories attempting to explain the reasons for our failures in this matter. One of the most famous theories is known as the Fermi paradox. Named after the Italian physicist Enrico Fermi, it asks the question of why humanity still did not meet alien life, if all the prerequisites indicate that our universe must be other civilizations that are capable of interstellar travel.

Aliens may be lurking in the oceans, said astronomer Alan Stern

Many have tried to answer this question. According to some, we just are not looking where you want them. Others believe that the aliens are in hibernation. According to the third, we are the only technologically advanced civilization in the universe.

Alan Stern, planetary science and the scientific adviser NASA space mission "New Horizons", on this account has a different theory. And of it he shared at the recent 49 th annual meeting of the American Astronomical Society's planetary scientists.

According to Space.com, Stern came up with the idea that extraterrestrial intelligent life can actually exist in other parts of our galaxy, but it lives, most likely, in the dark depths of the ocean under the surface of the planets. Such oceans should definitely exist in our galaxy, at least at a minimum because there are in our own solar system - Pluto, the satellites of Jupiter, Saturn's moon Titan, to name a few. Subsurface oceans, according to Stern, could give life more time to develop it, defending against external threats, which usually affect any other exposed surface of the planets.

"Solar flares, supernovae explosions, a feature of the orbits, the presence or absence of the magnetosphere and atmosphere - all of these factors in this case are insignificant", - explained Stern Space.com.

will continue to delve into his theory, Stern also suggested that extraterrestrial civilizations, all of his time living under the surface, may be unaware of the existence of another, oversurface world. And if this is indeed the case, then these civilizations certainly know much less than we do about the surrounding galaxy. Unfortunately, even if these civilizations wanted someone (in this case, us) make contact, we most likely would not be able to detect signs of these attempts. Very low frequency radio waves could certainly do something to help, but even with them the chance for the detection would have been extremely low.

Permanent life in the ocean is not can not put off the mark. When you open the opportunity and the desire to travel between stars such civilizations would have to seek a solution to the serious problems associated with life-support systems, since the latter would certainly have worked primarily on water. An incredibly large volume of water. Water is known to be a very difficult matter. Therefore, even in the case of reaching orbit their home planet such civilizations would have to use a much more significant amounts of fuel required for the acceleration of the spacecraft. Yet Stern theory - it is only a theory. Astronomer never considered it as a peremptory answer to the Fermi paradox.

"Perhaps this riddle no answer. My theory only adds a new element to the debate, "- he says.

Humanity will no doubt continue to search for intelligent extraterrestrial life, and its discovery will undoubtedly be the biggest in our human history. Predict exactly when this will happen, we can not, but at least we will have a plan for further action when the time comes.