[Sanat]

This is how the "E.T. 101 - The Cosmic Instruction Manual" defines the term "Alien". A must read for all those that fear an "alien invasion":

Alien

The people of this planet have expressed a certain neurotic fear about an alien invasion. That fear has been triggered by a nagging sense that in a limitless universe there just might be other intelligent life. In a typically xenophobic and self-serving response, governments are arming against what they already know to be true. This, of course, is not general knowledge but, in paternalistic systems of government, important information is never general knowledge. In the name of national security, the acts of government are often hidden from the governed. This statement is not to make you paranoid or stir you to political revolt; it is simply to demonstrate to you the behavior of an alien and the meaning of the term.

You need not scour the skies for evidence of an alien invasion. Look around you instead. Look at those who are peddling fear, vending death, and poisoning the planet. Look at those who hide the truth so that the power they have derived from lying will not be threatened. And look at those sadly separated beings that have the audacity to gaze out upon the created universe, wondering if there could possibly be anyone else out there, all the while arming just in case there is. This is the alien invasion you worry about, the one you externalize and fear. It is also the one that surrounds you and the one you have been living out for thousands of years.

There is no point in fearing an invasion of alien, since the invasion has already happened and the aliens are already here. You would be better advised to fear that no true intelligence will ever show up or this planet. And you would be even better advised not to fear anything at all.