A Brief and Independent Physiological Overview of the Supposed Aliens Colloquially Known As "Greys"


On this page, I will evaluate in simple terms the biological and physiological properties of a specimen of the alleged alien belonging to a species informally referred to as a “grey”.

Figure I


Figure II


Figure III


Although I am not studying biosciences and never have done so formally, when using logic one can deduce information about the species and its home planet, assuming that the entire thing is not some great government hoax. Looking at the figures above, particularly Figure III, one can see that if it is in fact a great hoax, then its creators went to a great extent to make it believable. The detail in Figure III is extraordinary.

Setting aside the possibility of a hoax, we can surmise that the alien in the above figures died as a result of asphyxiation due to an internal fire in its spacecraft. The fact that some parts of the body are literally burned to a crisp, while other parts appear untouched by fire, indicate that the alien's burns likely came from molten shrapnel or the like impacting specific areas of the body, rather than simply being in contact with pure flame. The feet of the alien indicate that it had been walking on a burning or molten surface, and then collapsed onto its left knee. The alien began to lose much of its mobility at this point; indicated by the extreme damage taken by the knee, the alien was unable to return to its feet. It then collapsed onto its left side, resulting in the burn wounds as seen on its head and arm.

Below, I will evaluate specific areas of the alien's body.

Lower Body

The alien's lower body bears a much greater resemblance to a human than its upper body. Its large feet match to balance its tall body, but the lean musculature of the legs indicates that this particular specimen's leg muscles had atrophied, possibly due to spending so much of its time travelling in a small spacecraft, or being an alien that had a largely sedentary career - probably both.


The aliens arms and fingers are quite long and dextrous. Again, atrophied muscle in the arms indicates a sedentary lifestyle for this particular specimen.


The alien's chest is perhaps the most enigmatic part of its body. It's protruding chest indicates a very large lung; there doesn't seem to be a pair of lungs as there are in humans. A lack of a navel and lack of nipples indicates that the alien is not a mammal. The shoulder-chest connection appears to be higher than in a human, and there is a conspicuous lack of pectoral structure. The overall lack of chest musculature indicates that the “grey” species evolved from something other than a primate-type origin.


The alien appears to have an extremely small olfactory system - perhaps it had no sense of smell at all. Having no sense of smell might be a drawback for the aliens's industrial faculties in that smoke would be undetectable except by sight or by a smoke detector.


The alien appears to have lips and a jaw system similar to that of a human. No teeth are visible in the above photographs. It is probable that the “grey” species has an advanced language, capable for humans to understand with appropriate instruction.


The alien's eyes take up a very large portion of its head - less than that of a raptor, but greater than that of a human. In addition, it has binocular vision, as humans do. The “grey” species probably has excellent vision, equal or superior to that of a human.


It is difficult to determine from the above photographs if the alien has a sense of hearing. One can presume that it does, if we assume also that it speaks a vocal language. It's small mouth and narrow space for a diaphragm in its chest means that the vocalisations the alien made were soft compared to that of a human.


The alien appears to have an extraordinarily large brain compared with its body size. This would explain its species pioneering interstellar travel. Although the alien's body is evidently smaller than that of an adult human, its brain is much bigger in relation to its entire face than that of a human. It is probable that the alien would have had a very high IQ by human standards. It is impossible to say which sections of the brain are more developed than others. It appears that the back of the alien's brain case is expanded much more than that of a human, but that is no evidence of anything, since the brain could be positioned differently in a “grey” head than in a human head anyway.

The alien's home planet

The slight body, even when deducting atrophy from inactivity from being confined within a spacecraft or having a sedentary lifestyle, when compared with the very large brain, indicates that the alien's home planet has lower gravity than that of Earth. Lower gravity might make extraction of resources and industrial production more efficient as well. The alien's lack of body hair and large eyes indicates that the planet may be much darker than Earth on average. The alien's small mouth and nose, and possibly only a single lung, may indicate a richer atmosphere than than of Earth.

Possible cause of the crash

An alien species technologically advanced enough to comfortably send its own species to visit a planet in another solar system would, ideally and most likely, have many safeguards against equipment failure. So if indeed what we see in the above photographs is an alien, how did its spacecraft fail and crash catastrophically?

We can consider the possibility that the spacecraft of the time was a flimsier model than later models; the model of spacecraft that the alien in the above photographs was travelling in was built by engineers who lived on a planet of lesser gravity than Earth. Therefore, the probability of mechanical/structural failure of an early-generation interstellar spacecraft built by the “greys” was much greater. After the loss of this spacecraft, the “greys” realised that they needed to make sturdier spacecraft, if they wanted to further explore Earth.

It is also possible that the “greys” lesser tolerance for gravity than humans contributed to the crash; loss of consciousness in the crew after spending a certain amount of time within Earth's atmosphere could have resulted in a crash if Earth's gravity was too much for the crew to tolerate.

Also, and possibly in addition to the above reasons, the possible lack of a sense of smell in the “greys” would have made it more difficult for them to detect fire within the cabin of their ship, a fire possibly caused by Earth's gravity being too much for the early-generation alien ship from a planet of lesser gravity.

Why does it look so similar to a human?

It is a very good question, as to how the alien bears so many similarities, in spite of its differences, to a human?

One possibility is that the “grey” species in fact originated from Earth. There is a theory that a highly-intelligent humanoid could have developed from the dinosaur known as the Troodon:


Considering that humans have gone from living in caves and lean-tos to visiting Luna and unleashing the power of nuclear energy within just a few hundred thousand years, it is not entirely unfeasible that an intelligent reptilian humanoid species lived on Earth prior to the development of modern humans. It would also explain why the aliens are so curious as to what became of the planet their distant ancestors lived on. A migratory instinct in the Troodon (being a close relative of birds) might explain why the Troodon-humanoid species left Earth completely.

Humans and other mammals have a capacity to bond on emotional level, due to being similar enough neurologically and biologically overall. However, the greater divide between reptiles and mammals may make it difficult for “greys” and humans to build any sense of trust and understanding in each other in the event that we and they ever acknowledge and meet each other.

Astronomy | Space

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