You can ask several people depending upon their profession what are, what we define as extraterrestrial beings? Next question: do they really exist? Third question: If they do exist are they already among us?

Talk to an astronomer and he’ll say that the mathematical likelihood of extra solar life is real, but we are so far from any planet that might have life that the two civilizations might never meet.

Talk to a military historian or weapons expert who sees the past through the parallels of aggression, the past, and what there is to gain from conquest and he’ll tell you that if we encounter extraterrestrial life it could be a rogue marauding type of civilization that feeds on less developed civilizations and benefits from stealing their resources, even their genetic material to perpetuate their own race which has lost its ability to reproduce much as mankind is gradually doing now!

We may not ever meet more advanced civilizations as they would have had so much of a head start in evolution that for them to communicate with mankind would be like a human scientist trying to make contact with primitive life forms such as an earth worm or an ant colony!

When Enrico fermi posed the question, “If E.T. exists, why haven’t they phoned us yet?” Based upon the fact that mankind has been sending out TV, radio waves, and radio telescope signals into space at the speed of light for decades now, surely some of those signals could have reached some inhabited solar system by now, right? However, officially no!

A theologian will tell you that our God in the Bible, makes no such claims of beings from other planets though in Indian culture, they view extraterrestrial intervention in Hindu belief. Descriptions of the battles between entities certainly seem like the use of missiles and perhaps nuclear explosions!

In Norse mythology, the capability of such Gods as Thor and Loki seem to be like the ancient man’s interpretation of advanced weaponry and speeds of travel that rival current technology!

The Mayan and Incas drew rock carvings that seem to indicate astronaut beings flying rockets and even what appear to be jet fighter trinkets!  

Ancient Egyptian hieroglyphs seem to point to powers of the gods that seem to be describing a ruling class of ancient astronauts who enslaved mankind and built huge carved blocks of granite moved impossible distances and constructed so precisely that even modern building techniques would be unable to reproduce such architecture! The pyramids and the Sphinx have survived eons. The question would be-would anything we’re building today survive 5 or 6 thousand years and still be recognizable? Probably not.

Ask an ancient alien anthropologist such as Eric Von Daniken and he believes that they were here. And that there is numerous interpretable visual evidence on caves and outer rock walls made by ancient artists depicting what they saw!

Zechariah Sitchin, an economic and political major educated at the London School of Economics and Political Science always queried the refusal in Bible class to mention or explain the Elohim “Those who came from the sky” and spent many years studying ancient civilizations that seemed to possess evidence of alien contact!

Finally, Doctor Steven Greer who firmly believes that not only is mankind already in contact with several alien civilizations, but that we're are putting ourselves at risk with our nuclear arms race and that we could be obliterated by more advanced extraterrestrials who believe we are a nuisance and even a threat as the current powers that be refuse to disarm! He believes that a deadly game of disinformation and even assassination of those who know too much is afoot!

So, what do invasive species do in our world in the animal kingdom? If they are allowed to be introduced into an environment that they did not evolve in or adapt to-they can be very destructive and the naturally occurring species of that threatened environment cannot effectively defend themselves or their territory! The result? The minimalization of the competing life forms or extinction altogether of the original occupants of their own habitat! Examples: Feral hogs and boars, introduced decades ago whose growth has become uncontrolled costing billions in famers crop losses, the Chinese carp that have displaced many species of fish in the Great Lakes, the Burmese Python invasion of the Florida Everglades, Africanized honey bees who are taking over in North and South America, and the fire ant expansion of territory across the US destroying other ant species, just to name a few!

If you ever saw the movie “They Live” it’s a chilling story of Earth that has been thoroughly infiltrated by alien beings that can electronically control human perception, disguise themselves, and carry on with their undetected evil agenda of subjugation of the human race. This movie has made a huge impression on the audiences of the past and present who equate this scenario to political sabotage, ideological propaganda, political and social betrayal, and of course-conquest of our species by a more advanced and sinister race! Is this possible? To Doctor Steven Greer and the late Phil Schneider, many believe was murdered for what he knew, they think the human race is in a state of merger with extraterrestrials whether for good or bad, it seems there is little that can be done about it! From the little grays, to the Nordic Tall Whites, to beings that appear to be human, to the Lizards who are most definitely are an existential threat to humanity-they must certainly qualify as an existential threat to humanity!