| 
			  
			  
			
  
			by Jacques F. Vallee 
			Journal of Scientific Exploration, 
			Vol. 4, No. 1, pp. 105- 17 
			1990 
			from
			
			ScientificExploration Website 
			  
				
					
						| 
						Presented at the 
						Eighth Annual Conference of the Society for Scientific 
						Exploration, Boulder, Colorado, June 1989. |  
			  
			Abstract 
			  
			Scientific opinion has generally 
			followed public opinion in the belief that unidentified flying 
			objects either do not exist (the "natural phenomena hypothesis") or, 
			if they do, must represent evidence of a visitation by some advanced 
			race of space travelers (the
			
			extraterrestrial hypothesis or 
			"ETH").  
			  
			It is the view of the author that 
			research on UFOs need not be restricted to these two alternatives.
			 
			  
			On the contrary, the accumulated data 
			base exhibits several patterns tending to indicate that UFOs are 
			real, represent a previously unrecognized phenomenon, and that the 
			facts do not support the common concept of "space visitors."  
			  
			Five specific arguments articulated here 
			contradict the ETH:  
				
					
					
					unexplained close encounters are 
					far more numerous than required for any physical survey of 
					the earth
					
					the humanoid body structure of 
					the alleged "aliens" is not likely to have originated on 
					another planet and is not biologically adapted to space 
					travel
					
					the reported behavior in 
					thousands of abduction reports contradicts the hypothesis of 
					genetic or scientific experimentation on humans by an 
					advanced race
					
					the extension of the phenomenon 
					throughout recorded human history demonstrates that UFOs are 
					not a contemporary phenomenon
					
					the apparent ability of UFOs to 
					manipulate space and time suggests radically different and 
					richer alternatives, three of which are pro- in outline form 
					as a conclusion to this paper. 
			  
			  
			Initial Hypotheses
 Over the last 40 years we have observed the steady development of a 
			group of aerial phenomena generally referred to as Unidentified 
			Flying Objects or UFOs.
 
			  
			After a brief attempt to explain the 
			reports in terms of secret proto-types (the "Advanced Technology 
			Hypothesis,") two major explanations have captured the attention of 
			the public, the media and the scientists. These two theories are the 
			natural phenomena hypothesis and the extraterrestrial hypothesis, or 
			"ETH."
 A large majority of the scientific community, which is typically 
			unaware of the observational data except as reported in the press, 
			continues to support the natural phenomena hypothesis. It asserts 
			that all the reports can be explained as a combination of observing 
			errors, classical atmospheric phenomena and human-made objects, 
			possibly combined with little-known psychological illusions which 
			are of no relevance to physics.
 
			  
			It concludes that no new knowledge is to 
			be gained from further specialized study of the observations by 
			professional scientists, perhaps with the exception of marginal 
			improvements to the documentation of some altered states of 
			perception.
 A majority of the public and the quasi-totality of the UFO 
			researchers have supported the ETH.
 
			  
			Under this hypothesis UFOs are physical 
			devices con-trolled by intelligent beings from another planet who 
			have been visiting the earth as part of a scientific survey begun at 
			the time of World War very much in the fashion we ourselves plan to 
			follow in exploring remote planetary environments. In their 
			interpretation of the phenomenon, this survey includes the 
			reconnaissance of strategic sites, the gathering of mineral and 
			plant samples and sophisticated interaction with the human and 
			animal life-forms present on the planet.
 The recent interest in reported abductions of witnesses has 
			contributed what many UFO researchers regard as convincing evidence 
			that such extra-terrestrial visitors are conducting a series of 
			biological interventions de-signed to collect samples of human 
			tissue and body fluids and are engaged in cross-breeding experiments 
			for genetic purposes.
 
			  
			  
			Challenges
 
 The slow but steady accumulation of detailed reports and the 
			continuing research on old cases make it possible to test these 
			hypotheses against an increasingly documented data base.
 
 The Natural Phenomena Hypothesis does not fare well under 
			these tests. Many reports are quite specific in terms of the 
			physical and biological parameters that can be derived from an 
			analysis of the interaction between the phenomenon and the 
			environment.
 
			  
			A presentation by Velasco at the 1989 
			SSE Conference has pointed out that no less than 38% of the cases 
			studied by the French
			
			CNES (Centre National Spatiales, 
			the French equivalent of NASA) have failed to be identified in terms 
			of natural effects (Velasco, 1989).
 The environmental interactions most often reported include 
			abrasions, burns and effects on plants, animals and humans. The
			
			work of Velasco and Bounias in 
			Trans-en-Provence (submitted for publication) is a case 
			in point.
 
			  
			So is the recent research done in 
			Brazil, which will be part of a forthcoming report on field work 
			conducted privately by the author over the last 10 years (Vallee, in 
			press; a summary of the Brazilian studies was also presented at the 
			July 1989 MUFON meeting in Las Vegas, Nevada). The observed 
			phenomena include radiation effects and have not been accounted for 
			by a combination of known physical and psychological causes.
 At the same time, however, we find that the ETH, too, is 
			increasingly challenged by the new patterns researchers are 
			uncovering.
 
			  
			Five major contradictions worthy 
			of special examination will be studied in this paper.  
			  
			They have to do, 
				
					
					
					with the surprisingly high 
					frequency of close encounters
					
					with the physiological 
					description of the "occupants" 
					
					with the contents of the 
					abduction reports
					
					with the historical extension of 
					the phenomenon
					
					with the physical behavior of 
					the reported craft 
			We will discuss these five points in 
			turn, then we will propose new hypotheses attempting to take these 
			objections into account. 
			  
			  
			Argument One - 
			Close Encounter Frequency
 
			Approximately 20 years ago, when the first catalogue of close 
			encounter reports was compiled (Vallee 1969), I was surprised to 
			find that it reached over 900 entries, well beyond the expectations 
			of most researchers at the time.
 
			  
			With the increased attention now placed 
			on this category of sightings the lists of unexplained
			
			close encounters have grown beyond 
			this early catalogue. Estimates place the size of the current sample 
			between 3,000 and 10,000 cases, depending on the criteria that are 
			used. We offer the figure of 5,000 as a conservative estimate.
 This remarkably large number can and should be used as a challenge 
			to the natural phenomenon hypothesis:
 
				
				If UFOs were simply a peculiar 
				atmospheric effect, such as a plasma discharge, most of the 
				still-unidentified cases could be accounted for by taking into 
				consideration the corresponding patterns. 
			It should also be stressed that we are 
			not concerned here with the general
			
			appearance of UFOs in the sky but 
			with close encounters only, those dramatic episodes in which 
			witnesses describe a phenomenon in their immediate vicinity.
 Yet the same argument can also be used against the ETH:
 
				
				It is difficult to claim that space 
				explorers would need to land 5,000 times on the surface of a 
				planet to analyze its soil, take samples of the flora and fauna, 
				and produce a complete map.  
			While the ETH could perhaps account for 
			the 923 landing reports in our 1969 compilation, the theory can no 
			longer be supported today.
 Neither is the figure of 5,000 a good estimate. Many indications 
			converge to show that only 1 case in 10 may actually get reported. 
			Therefore, the number of close encounters we need to explain is 
			probably of the order of 50,000. This does not take into account the 
			fact that the overwhelming majority of our sources are located in 
			Europe, the American continent and Australia.
 
			  
			It is logical to assume that the 
			phenomenon is worldwide, and that we are missing the true magnitude 
			of the problem at least by a factor of two. This leads to a figure 
			of 100,000 events.
 If we remain faithful to a strict interpretation of the ETH, even 
			this very large figure still underestimates the real number of 
			actual landings. Shouldn't we assume that extraterrestrial explorers 
			would land on our planet without regard for the presence of human 
			witnesses?
 
			  
			In fact
			
			Claude Poher 
			and I found (using independent databases) that the 
			geographic distribution of close encounters does indicate a pattern 
			of avoidance of population centers, with a higher relative incidence 
			of landings in deserts and in areas without dwellings (Poher & 
			Vallee, 1975). If we follow this line of reasoning then it would be 
			conservative to multiply our number by a factor of 10 to account for 
			the high ratio of sparsely populated over densely populated lands.
			 
			  
			This would place our estimate at million 
			landings to be explained. In other words, if human witnesses were 
			equally distributed over the surface of the land and if they 
			reported every close encounter they observed, the data universe 
			should contain 1 million records.
 This number still does not take into account another important 
			pattern in the phenomenon, namely its nocturnal character. First 
			published in 1963 this pattern shows no significant variation 
			between older and more recent cases and even yields the same 
			distribution when a very homogenous sample of previously unreported 
			cases from a single region is analyzed (Poher & Vallee, 1975).
 
 Figure 1 below, shows the frequency of close encounters as a 
			function of local time of day for 3 different, non-overlapping 
			samples compiled by the author, namely (A) international catalogue 
			of 362 cases prior to 1963, (B) an inter-national catalogue 
			comprising 375 cases for the period 1963-1970 and (C) 100 cases from 
			Spain and Portugal.
 
 On these curves it can be seen that the number of close encounters 
			is very low during the daylight hours. It starts increasing about 5 
			pm and reaches a maximum about 9 pm. It then decreases steadily 
			until 1 am, then rises again to a secondary peak about 3 am and 
			returns to its low diurnal level by 6 am.
 
 After these curves were published other researchers have conducted 
			their own studies which have led to similar results. In particular
			Merritt working from UFOCAT files, found that electromagnetic 
			effect cases, physical trace reports and occupant reports had a 
			major peak at 9 pm and a low daytime average. The occupant reports 
			showed a secondary peak about 3 am (Figure 2).
 
 Researcher Randles (1981) conducted her own study of 223 
			cases from the files of 2 British groups and found a very similar 
			pattern of high nocturnal activity with a major evening peak and a 
			secondary predawn peak. Abduction reports, however, showed a maximum 
			about midnight (Figure 3).
 
 Given such a stable pattern we are led to ask, what would the hourly 
			distribution look like if we had a constant number of potential 
			witnesses, in other words if people did not retire at night? The 
			answer can be approximated by taking the average distribution of 
			outdoor population as a function of time of day (Szalai, 1972) and 
			computing a de-convolution against the sighting report curve.
 
			  
			This operation yields an activity curve 
			that rises continuously throughout the night and peaks about 3 am.
			
 
			 Fig. 1.
 
			Frequency of close 
			encounter reports as a function of time of day.  
			A = 362 cases prior 
			to 1963, all countries 
			B = 375 cases between 
			1963 and 1970, all countries 
			C = 100 cases from 
			Spain and Portugal only.
 
			It also shows that the total number of 
			actual events should be 14 times the number of observed phenomena. 
			This gives a total estimate of 14 million landings in 40 years if we 
			strictly adhere to the ETH.
 The question to be answered is:
 
				
				What objectives could 
				extraterrestrial visitors to the earth be pursuing, that would 
				require them to land 14 million times on our planet? 
			It should be kept in mind that the 
			surface of the earth is clearly visible from space, unlike Venus or 
			other planetary bodies shrouded in a dense atmosphere.  
			  
			Furthermore, we have been broadcasting 
			information on all aspects of our various cultures in the form of 
			radio for most of this century and in the form of television for the 
			last 30 years, so that most of the parameters about our planet and 
			our civilization can be readily acquired by unobtrusive, remote 
			technical means.  
			  
			The collecting of physical samples would 
			require landing but it could also be accomplished unobtrusively with 
			a few carefully targeted missions of the type of our own
			
			Viking experiments on Mars.  
			  
			All these considerations appear to 
			contradict the ETH.
 
			 
			Fig. 2.  
			Frequency of close 
			encounter and EM effect cases as a function of time of day 
			 
			From "Modern Research 
			by Jenny Randles, 1981, UFO Study: A Handbook for Enthusiasts, p. 
			194, Figure 18.  
			
 
			  
			Argument Two - 
			Physiology
 
			The vast majority of reported 
			"Aliens" 
			have a humanoid shape that is characterized by two legs, two 
			arms and a head supporting the same organs of perception we have, in 
			the same number and general appearance.
 
			  
			Their speech uses the same frequency 
			range as ours and their eyes are adapted to the same general segment 
			of the electromagnetic spectrum. This indicates a genetic 
			formulation that does not appear to differ from the human genome by 
			more than a few percent.
 Such an observation, if the entities were in fact the product of 
			independent evolution on another planetary body as stated by the 
			ETH, would stretch our understanding of biology. Humans share the 
			unique combination of gravity, solar radiation, atmospheric density 
			and chemical composition known on earth with an array of creatures 
			closely related to us through evolution, yet deprived of legs and 
			arms like the dolphins or endowed with multiple eyes like the 
			spiders.
 
 It should also be kept in mind that the human shape has evolved in 
			response to an extremely narrow set of constraints.
 
			  
			For example, it would not exist as it 
			does today if the earth had started out with twice its present mass, 
			giving a surface gravity of 1.38 times earth normal.  
			  
			 Fig. 3.
 
			Frequency of close 
			encounter cases, including
			
			abductions, as a function of time 
			of day  
			From "Modern Research 
			by Jenny Randles, 1981,  
			UFO Study: A Handbook 
			for Enthusiasts, p. 20 1, Figure 19
 
			Such an environment would have forced 
			the development of a stronger skeleton and might have precluded 
			bipeds altogether.  
			  
			Similarly, a planet with half its 
			present mass and a surface gravity of 0.73 times what it is now 
			would have radically affected our shape.  
			  
			As pointed out by Dole (1969) if 
			the inclination of the equator had been 60 degrees instead of 23.5 
			degrees, seasonal weather changes would be intolerable to us:  
				
				life would have had great difficulty 
				in getting started and humans would have evolved in very 
				different ways.  
			If the day was 100 hours long instead of 
			24 hours, mankind as we know it could not have evolved or survived 
			at all.
 How, then, can we expect that extraterrestrial visitors from a 
			completely different planetary environment would not only resemble 
			us but breathe our air and walk normally on the earth?
 
 Even if, by some unknown principle of exobiology, the Aliens did 
			evolve naturally into the humanoid shape, wouldn't they modify their 
			bodies using genetic engineering techniques to enhance their ability 
			to work and survive in space, as humans may have to do over the next 
			century?
 
 This last argument can be countered by assuming that our "Visitors" 
			have precisely been created through such genetic manipulation into a 
			form with which we can interact.
 
			  
			But if that is the case, why not produce 
			human specimens biologically indistinguishable from the earth's 
			population?  
			  
			The ETH fails to give a convincing 
			answer on this point. Even more intriguing is the observation that 
			the reported display recognizable human emotions such as puzzlement, 
			interest or amusement (as in
			
			the Betty Hill case of 1961 or the 
			Valensole case of 1965). This suggests not only biological 
			similarity but extensive social acculturation. 
			  
			In summary, the
			
			physiology of the "Aliens"
			conforms to human biology and culture to an extent that is 
			not compatible with the ETH.
 
			  
			Argument Three 
			- Abduction Reports
 
			The growing number of
			
			abduction reports is being used by 
			a vocal segment of the UFO research community as further evidence 
			that we are, in fact, being visited by extraterrestrial aliens, even 
			if their origin has not yet been revealed.
 
			  
			In the context of the present paper, a 
			careful survey of the reported behavior of the alleged ufonauts 
			argues exactly in the opposite direction.
 According to current UFO magazines and books, the number of reported 
			and documented abductions is now measured in multiples of 1,000. 
			Such incidents are characterized by what the witness reports as 
			being transported into a hollow, spherical or hemispherical space 
			and being subjected to a medical examination.
 
			  
			This is often (but not always) followed 
			by the taking of blood samples, various kinds of sexual interaction, 
			and loss of time. The entire episode is frequently wiped out of 
			conscious memory and is only retrievable under hypnosis.
 At this writing over 600 abductees have been interrogated by UFO 
			researchers, sometimes assisted by clinical psychologists. Although 
			nothing concrete seems to have been learned from these case studies 
			about the origin and purpose of the visitors, those doing the 
			investigations are vocal in their claim that the abductions are 
			further evidence of the ETH.
 
 In order to examine this claim, let us assume that extraterrestrial 
			intelligence has indeed developed the ability and the desire to 
			visit the earth. It is a reasonable assumption to expect that such 
			visitors would know at least as much as we do in the fundamental 
			scientific disciplines such as physics and biology.
 
			  
			Few ufologists, in fact, argue against 
			this assumption.
 In particular, the visitors would presumably know as much about 
			medical techniques and procedures as our own practitioners. Today 
			the average American doctor can draw blood, collect sperm and ova or 
			remove tissue samples from his or her patients without leaving 
			permanent scars or inducing trauma.
 
			  
			The current state of molecular biology - 
			a science which is in its infancy on earth - would already permit 
			that same doctor to obtain unique genetic "fingerprint" information 
			from such samples. He could also fertilize the ova and obtain 
			"test-tube" offspring, and it is conceivable that cloning could 
			duplicate the beings thus produced ad
 A team of scientists equipped with the commonly reported UFO 
			technology would be in an excellent position to take control of 
			blood banks, sperm banks or collections of embryos available at 
			major research hospitals and research centers without creating the 
			massive disturbances described by abduction researchers. They would 
			be able to accomplish it while escaping detection.
 
			  
			Equipped with the state-of-the-art 
			techniques of current U.S. medicine, it would be conceivable that 
			the entire human race could, in time, be restarted from this pool of 
			genetic material.  
			  
			Even gene therapy and the 
			creation of hybrid species is well within our theoretical 
			horizon, even if it has not completely been reduced to practice. 
			None of these accomplishments require the procedural behavior of the 
			"Alien Doctors" described by abduction researchers. The means of 
			permanently erasing the memory of the victims through the use of 
			appropriate drugs are also available in the current pharmacopeia.
			 
			  
			Whatever the supposed "Aliens" are 
			doing, if they actually perform what appear to be shockingly crude 
			and cruel simulacra of biological experiments on the bodies of their 
			abductees, is unlikely to represent a scientific mission relevant to 
			the goals of extraterrestrial visitors.  
			  
			The answers may have to be sought in 
			other directions.
 
			  
			  
			Argument Four - 
			History 
			The ETH was initially formulated at a time when the earliest 
			sightings known dated from World War II. It could be validly argued 
			that this major conflict was detected from space and that the 
			observation of nuclear explosions on earth precipitated the Aliens' 
			decision to survey our planet, perhaps in an effort to assess the 
			human race as a potential threat to other intelligent life-forms.
 
 The mounting proliferation of evidence for similar phenomena not 
			only before 1945 but during the 19th century and indeed
			
			in the remote past of our culture 
			has become convincing, although some ufologists, borrowing an 
			argument from their skeptical opponents, are now pleading that such 
			data should simply be disregarded.
 
 If it can be established that the phenomenon has indeed existed 
			through-out history, adapting only its superficial shape but not its 
			underlying structure to the expectations of the host culture, then 
			we are unlikely to be dealing with extraterrestrials doing a survey 
			of the earth. Nor are we dealing with advanced prototypes.
 
			  
			Again, a more sophisticated class of 
			explanations than both the ETH and the advanced technology 
			hypothesis must be sought.
 In previous works I have pointed out that aerial phenomena very 
			similar to our 
			UFOs had been reported in the 9th 
			century in the form of vessels in the sky, as airships in 
			the days of Jules Verne, as ghost rockets in 1946 spacecraft in more 
			recent times, as if they mimicked human expectations. Everything 
			works as if the UFO phenomenon remained consistently one step ahead 
			of human technology.
 
			  
			In the last 10 years, as molecular 
			biology has become more glamorous than electronics or even aerospace 
			in our modern civilization, it should not be surprising to find the 
			"Aliens" per-forming simulacra of genetic engineering interventions.
			 
			  
			The supporters of the ETH may have 
			fallen into the trap of a first-level reading of the phenomenon's 
			message.
 Such historical considerations, combined with extensive research on 
			mythology and folklore have led European researchers like Meheust 
			(1978, 1985) and Evans (1986) to regard the entire UFO 
			phenomenon as a projection of the consciousness of the 
			witnesses. They point out that and legends, too, stay one step ahead 
			of human scientific realizations.
 
			  
			This "Psycho-Sociological Hypothesis" 
			has aroused considerable opposition among U.S. ufologists and is now 
			creating a deep chasm between European and American ufology, with 
			the former advocating agree, symbolic reading of the discourse 
			presented by the witnesses.
 The abduction claims are especially interesting to the proponents of 
			the psycho-sociological theory:
 
				
				It is difficult to find a culture on 
				earth that does not have an ancient tradition of little people 
				that fly through the sky and abduct humans (Vallee, 1969, 1988).
				 
			It is standard for them to take their 
			victims into spherical settings that are evenly illuminated and to 
			subject them to various ordeals such as operations on internal 
			organs and "astral trips" to unknown landscapes.  
			  
			Sexual or genetic interaction is also a 
			common theme in this body of folklore. 
			  
			  
			Argument Five 
			- Physical Considerations
 
			As witnesses become less 
			reluctant in the reporting of their experiences, the notion that 
			UFOs are "somebody else's spacecraft" (in the words of Friedman) 
			with the implication of a technology powered by advanced propulsion 
			systems becomes less tenable, and possibly less appealing 
			scientifically than other notions.
 
			  
			But the alternative explanations, 
			notably the psycho-sociological hypothesis, also find themselves 
			severely challenged.
 The phenomena to be explained include not only strange flying 
			devices that are described as physical craft by the witnesses but 
			also objects and beings that exhibit the ability to appear and 
			disappear very suddenly, to change their apparent shapes in 
			continuous fashion and to merge with other physical objects.
 
			  
			Such reports seem absurd in terms of 
			ordinary physics because they suggest a mastery of time and space 
			that our own physical research cannot duplicate today.  
			  
			However, if these sightings can be 
			con-firmed either by direct observation, by photographic evidence or 
			by the weight of statistics they may represent an opportunity to 
			test new concepts of physical reality at a time when many 
			theoreticians are grappling with the possible existence of
			
			N-dimensional universes, with N 
			greater than 4. 
			
  
 
 
			New Hypotheses
 In conclusion, it is useful to speculate about several hypotheses 
			that go beyond the earlier theories listed in Table 1.
 
			  
			These ideas do take into consideration, 
			with various degrees of success, the five objections we have 
			re-viewed. These new hypotheses should only be regarded as a means 
			of stimulating discussion, not as formal proposals (see Table 2).
			 
			  
			One such line of speculation has been 
			advanced by Devereux (1982) who has spoken of UFOs as "Earth 
			Lights," an unrecognized physical, terrestrial phenomenon which 
			impresses the consciousness of the witnesses to take the form of a 
			mental image, possibly a mythological figure.  
			  
			Derr and Persinger have 
			extended Devereux' proposals. 
			  
			In the mid-70's I proposed to approach 
			the UFO phenomenon as a control system, reserving judgment as to 
			whether the control would turn out to be human, alien or simply 
			natural. Such control systems, governing physical or social events, 
			are all around us.  
			  
			They can be found in the terrestrial, 
			ecological and economic balancing mechanisms that rule nature, some 
			of which are well understood by science.  
			  
			This theory admits two interesting 
			variants:  
				
					
					
					An Alien intelligence, possibly 
					earth-based, could be training us towards a new type of' 
					behavior. It could represent the "Visitor Phenomenon" of
					
					Strieber (1987) or some 
					form of "supernature," possibly along the lines of a
					"Gaia" 
					hypothesis
					
					Alternately, in a Jungian 
					interpretation of the same theme, the human collective 
					unconscious could be projecting ahead of itself the imagery 
					which is necessary for our own long-term survival beyond the 
					unprecedented crises of the 20th century. 
			
  
 
			British researcher Randles has 
			stressed that the analysis of the discourse of abductees 
			consistently reveals a breakpoint in time, after which the 
			percipient leaves normal reality behind.  
			  
			On the "other side" of this boundary 
			ordinary space-time physics no longer seems to apply and the 
			percipient moves as if within a lucid dream (or indeed a lucid 
			nightmare) until re-turned to the normal world. Randles calls this 
			phenomenon the "Oz Factor."  
			  
			Building on this observation, one could 
			theorize that there exists a remarkable state of psychic functioning 
			that alters the percipient's vision of physical reality and also 
			generates actual traces and luminous phenomena, visible to other 
			witnesses in their normal state.
 Finally, we could hypothesize extraterrestrial travelers using 
			radical methods of space-time manipulation, notably the use of 
			four-dimensional wormholes for space and possibly even time travel.
 
			  
			On this subject, see Morris, Thorne, and 
			Yurtsever (1988). On multidimensional models, see Mallove (1988, p. 
			255).  
			  
			Such travelers could perform many of the 
			physical feats ascribed to
			
			ufonauts and they could also 
			manifest simultaneously throughout what appears to us as different 
			periods in our history. This hypothesis represents an updating of 
			the ETH where the "extraterrestrials" can be from anywhere 
			and anytime, and could even originate from our own 
			earth.  
			  
			The arguments for a multidimensional 
			approach to the natural history of the UFO phenomenon have been 
			developed by the author in the book 
						
						
						Dimensions
			(Vallee, 1988). 
			  
			  
			Conclusion
 
 Exciting as an extraterrestrial visitation to earth would be, this 
			paper has pointed out that in the current state of our knowledge UFO 
			phenomena are not consistent with the common interpretation of this 
			hypothesis.
 
			  
			Neither do the observed patterns support 
			the theory that all UFOs can be explained as combinations of natural 
			effects, or as psycho-sociological processes. Therefore it is 
			proposed that future research in this field could fruitfully explore
			alternative hypotheses, such as those involving either 
			natural or artificial control systems, earth lights or wormhole 
			travel.
 The arguments raised here are not intended as a complete refutation 
			of the ETH or the natural phenomena hypothesis. Until the nature and 
			origin of UFO phenomena can be firmly established it will naturally 
			be possible to hypothesize that extraterrestrial factors, including 
			undiscovered forms of consciousness, are playing a role in its 
			manifestations.
 
			  
			But any future theory should 
			constructively address the facts we have reviewed.  
			  
			At a minimum, the idea of 
			extraterrestrial intervention should be updated to include current 
			theoretical speculation about other models of the physical universe.
 
			  
			  
			References 
				
				Bounias, M. Biochemical traumatology 
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