| 
			
 
 
  by Immanuel Velikovsky
 
			extracted from
			
			The Velikovsky Affair - Scientism Versus 
			Science 
			  
			In 1950 - as it is still largely today - 
			it was generally accepted that the theory of uniformity must be true 
			and that no process which is unobservable in our time could have 
			occurred in the past. It was also believed that celestial bodies, 
			the Earth included, travel serenely on their orbits in the void of 
			space for countless eons.  
			  
			In Worlds in Collision (1950), 
			however, I offered these theses:  
				
					
					
					there were physical upheavals of 
					a global character in historical time
					
					these catastrophes were caused 
					by extraterrestrial agents
					
					these agents can be identified’ 
					(from the Preface)
					
					these claims were termed a ‘most amazing 
					example of a shattering of accepted concepts on record
					   
					(Payne-Gaposchkin). 
					 
			The consequences of the theory affected 
			almost all natural sciences and many social disciplines. Especially 
			objectionable was the assertion that events of such magnitude took 
			place in historical times. 
 Worlds in Collision describes two (last) series of cataclysmic 
			events that occurred 34 and 27 centuries ago. Not only the Earth, 
			but also Venus, Mars, and the Moon were involved in near encounters, 
			when the Morning Star, then on a stretched elliptical orbit 
			following its eruption from the giant planet Jupiter, caused turmoil 
			among the members of the solar system before settling on its present 
			orbit.
 
 The description was derived from literary references in the writings 
			of ancient peoples of the world. The archaeological, geological, and 
			paleontological evidence for the theory was collected and presented 
			separately in Earth in Upheaval (1955).
 
 In order to explain how certain phenomena could have taken place - 
			how, for instance, Venus, a newcomer, could obtain a circular orbit, 
			or the Earth turn over on its axis - the theory envisaged a charged 
			state of the sun, planets, and comets, and extended magnetic fields 
			permeating the solar system. This appeared even more objectionable 
			since celestial mechanics had been solidly erected on the notion of 
			gravitation, inertia and pressure of light as the only forces acting 
			in the void, the celestial bodies being electrically and 
			magnetically sterile in their inter-relations. Worlds in Collision, 
			in its Preface, was acknowledged as heresy in fields where the names 
			Newton and Darwin are supreme.
 
 The only quantitative attempt to disprove one of my main theses was 
			made by D. Menzel of Harvard College Observatory (1952)
			[1]. He showed (‘if 
			Velikovsky wants quantitative discussion, let us give him one’), on 
			certain assumptions, that were I right the sun would need to hold a 
			potential of 10 to the 19th power volts; but, he calculated that the 
			sun, if positive, could hold only 1800 volts, and, if negative, it 
			follows from the equation, no more than a single volt.
 
 In 1960-61, V.A. Bailey calculated that to account for the data 
			obtained in space probes (Pioneer V) the sun must possess a net 
			negative charge with the potential of the order of 1019 volts
			[2].
 
 In 1953 Menzel wrote:
 
				
				‘Indeed, the total number of 
				electrons that could escape the sun would be able to run a one 
				cell flashlight for less than one minute.’[3]
				 
			My affirmation of electromagnetic 
			interactions in the solar system became less objectionable with the 
			discovery of the solar wind and of magnetic fields permeating the 
			solar system. 
 My thesis that changes in the duration of the day had been caused in 
			the past by electromagnetic interactions was rejected in 1950-51
			[4]. In February 1960, A. Danjon, Director, Paris Observatory, reported to 
			l’Académie des 
			Sciences that following a strong solar flare the length of the day 
			suddenly increased by 0.85 millisecond. Thereafter the day began to 
			decrease by 3.7 microseconds every 24 hours 
			[5].
 
			  
			He ascribed the fluctuation in the 
			length of the day to an electromagnetic cause connected with the 
			flare. His announcement ‘created a sensation among the delegates to 
			the General Assembly of the International Union of Geodesy and 
			Geophysics’ that year in Helsinki [5].
			
 V. Bargmann of Princeton University and L. Motz of Columbia 
			University claimed for me the priority of predicting radio-noises 
			from Jupiter, the existence of a magnetosphere around the earth, and 
			the high ground temperature of Venus [6]. 
			They stressed also that these discoveries later came as great 
			surprises, though I have insisted in my published works, in my 
			lectures, and in my letters that these physical conditions are 
			directly deducible from my theory.
 
 These claims were not made casually or in a veiled form. Some of my 
			arguments for Jupiter sending out radio-noises can be learned from 
			my correspondence with A. Einstein. I could add that if the solar 
			system as a whole is close to neutrality, and the planets possess 
			charges of opposite sign to that of the sun, Jupiter must have the 
			largest charge among the planets. Rotating quickly the charged 
			planet creates an intense magnetosphere.
 
 In the last chapter of W. in C. (‘The Thermal Balance of Venus’) I 
			insisted that ‘Venus is hot’ and ‘gives off heat’ as a consequence 
			of its recent origin and stormy history before settling on its 
			orbit. In 1954, R. Barker suggested that a layer of ice on the night 
			side of Venus is responsible for the ashen light 
			[7]. It is more probably a 
			visible sign of incandescence. When in 1961 the temperature of Venus 
			was found to be ca. 600° K (326.85° C), it was admitted that neither 
			radioactivity nor greenhouse effect suffices to explain why Venus is 
			so hot.
 
 Several of the sensors of Mariner II were beyond their capacity to 
			report temperatures before the nearest point to Venus was reached, 
			‘because temperatures beyond their designed scale were encountered,’ 
			as reported by C.W. Snyder to the meeting of the American 
			Geophysical Union, December 28, 1962 [8]. 
			On December 15, 1962, a day after Mariner II passed the point of 
			closest approach, the ‘temperature had inexplicably started to drop’[9].
 
 It is interesting also to know why the temperature of the upper 
			cloud layer of Venus measured in the 1920’s by Pettit and Nicholson 
			(-33° C for the dark side, -38° C for the bright side)[10] was 
			found in the 1950’s by Stinton and Strong to be a few degrees lower 
			(ca. -40° C for both sides)[11].
 
			  
			Could it be that Venus cools off at this rate ? It would point, too, 
			to its youth as a celestial body. 
 In 1950 the critics of Worlds in Collision (W. in C.) emphatically objected to the notion 
			that Venus is a young Planet or that it erupted from Jupiter.
 
 R.A. Lyttleton (1959-60) showed why the terrestrial planets, 
			Venus included, must have originated from the giant planets, notably 
			Jupiter, by disruption [12]. 
			W. H. McCrea (1960) calculated that no planet could have originated 
			by aggregation inside the Jovian orbit 
			[13].
 
 R.M. Goldstein and R.L. Carpenter reported to the 
			meeting of the American Geophysical Union at Palo Alto, the last 
			week of December 1962, that radar probes from Goldstone Tracking 
			Station between October 1 and December 17, 1962, confirmed earlier 
			indications that Venus rotates very slowly and retrogradely.
 
			  
			According to the press, this led to the 
			following surmises:  
				
				‘Maybe Venus was created apart from 
				other planets, perhaps as a second solar explosion, or perhaps 
				in a collision of planets.’[14]
				 
			To this, compare W. in C., p. 373:
			 
				
				‘The collision between major 
				planets... brought about the birth of comets. These comets moved 
				across the orbits of other planets and collided with them. At 
				least one of the comets in historical times became a planet - 
				Venus, and this at the cost of great destruction on Mars and on 
				the earth.’  
			In the section ‘The Gases of Venus’ in 
			W. in C. (1950), I concluded that Venus must be rich in 
			hydrocarbons. This theory was termed ‘surprising’ (H. Shapley, 1946) 
			when, a few years in advance of the publication of my book, I 
			requested that Harvard College Observatory make a spectral search 
			for hydrocarbons in Venus’s atmosphere 
			[15].  
			  
			In 1955, Fred Hoyle proposes, on 
			theoretical grounds, that Venus is covered by oceans of oil and that 
			its atmosphere is clouded by hydrocarbon droplets 
			[16]. I, however, wrote:  
				
				‘...as long as Venus is too hot for 
				the liquefaction of petroleum, the hydrocarbons will circulate 
				in gaseous form.’  
				(W. in C., p. 169). 
				 
			The extraterrestrial origin claimed in 
			my book for at least part of the petroleum deposits, notably those 
			of the Mexican Gulf area, was scorned (C. R. Longwell, 1950)[17], 
			and it was asserted that petroleum is never found in recent 
			sediments (J. B. Patton, 1950).[18] 
			 
			  
			However, soon thereafter, P.V. Smith (1952)[19] 
			reported the ‘surprising’ fact that the oil of the Gulf of Mexico is 
			found in recent sediment and must have been deposited during the 
			last 9,200 plus or minus 1,000 years. 
 Hydrocarbons were subsequently found on meteorites, a fact termed by 
			H.H. Nininger (1959)[20] 
			also ‘surprising’: ‘These resemble in many ways some of the waxes 
			and petroleum products that are found on the earth.’ Several months 
			ago, A.T. Wilson (1962)[21] 
			postulated an extraterrestrial origin of the entire terrestrial 
			deposit of oil. In W. in C. (p.55), presence of hydrocarbons on 
			meteorites was anticipated.
 
			  
			The experiment in which high molecular 
			weight hydrocarbons were compounded from ammonia and methane with 
			electrical discharges (Wilson, 1960) [22] 
			supports the view that the planet Jupiter (rich in ammonia and 
			methane) was the source of the hydrocarbons on Venus, on meteorites, 
			and in some of the earth’s deposits (W. in C., ‘The Gases of 
			Venus’). 
 My contention that Mars’s atmosphere must be rich in argon and neon 
			and possibly nitrogen was made early in my work (lecture titled 
			‘Neon and Argon in the Atmosphere of Mars’).
 
			  
			A few years later, 
			Harrison Brown, on theoretical grounds and independently, arrived at 
			the same conclusion concerning argon:  
				
				‘In the case of Mars, it might well 
				be that argon is the major atmospheric constituent.’[23]
				 
			But he thought that rare gases ‘are 
			essentially non-existent’ on meteorites. In recent years neon and 
			argon have been repeatedly discovered on meteorites (H. Stauffer, 
			1961)[24], as anticipated in 
			W. in C. (pp. 281 ff, 367). 
 Concerning the Moon, I asserted that its surface had been subjected 
			to stress, heating (liquefaction) and bubbling activity in 
			historical times.
 
				
				‘During these catastrophes the 
				moon’s surface flowed with lava and bubbled into great circular 
				formations, which rapidly cooled off ...In these cosmic 
				collisions or near contacts the surface of the moon was also 
				marked with clefts and rifts’  
				(W. in C., ‘The moon and Its 
				Craters’).  
			H. Percy Wilkins (1955) described 
			'numerous domes that might be regarded as examples of bubbles which 
			did not burst.’[25]. 
 Signs of tensional stresses have been detected on the Moon (Warren 
			and Fielder, 1962)[26]; volcanic activity has been unexpectedly 
			discovered by Kozyrev (1958)[27]. 
			Sharp outlines of lunar formations could not have persisted for 
			millions of years in view of the thermal splintering due to great 
			changes in temperature, over 300 degrees, in the day-night sequel 
			and during the eclipses.
 
			  
			H. Jeffreys (1959)[28] 
			drew attention to this evidence for the youth of the surface 
			features, but made it dependent on the presence of water in the 
			rocks. Since there seems to be volcanic activity on the Moon, water 
			is most probably present in the rocks. 
 Assertions that the Earth’s axis could not have changed its 
			geographical or astronomical position constituted one of the main 
			arguments against Worlds in Collision 
			[29]. They gave place to the theory of wandering poles. 
			Th. Gold (1955ff)[30] shows 
			the error in the view of G. Darwin and Lord Kelvin on the subject, 
			and stresses the comparative ease with which the globe could - and 
			did - change its axis, even with no external force applied.
 
 Confirmed is also the conclusion that advanced human culture would 
			be found in the today uninhabited area ‘on the Kolyma or Lena rivers 
			flowing into the Arctic Ocean’ in northeastern Siberia (W. in C., p. 
			329) in the region where herds of mammoths roamed.
 
			  
			Already in 1951, A. P. Okladnikov
			[31] making known the 
			results of his research in northern Siberia, wrote:  
				
				‘about two to three millennia before 
				our era, Neolithic races...spread to the very coast of the 
				Arctic Ocean in the north and the Kolyma in the east.’ 
				 
			Twenty-five hundred years ago copper was 
			worked in the taiga of Yakutsk. 
 Under the heading ‘The Reversed Polarity of the Earth’ (W. in C., 
			pp. 114ff.) is written:
 
				
				‘In recent geological times the magnetic 
			poles of the globe were reversed.’  
			The phenomenon that could cause 
			it was described, and the question was asked,  
				
				‘whether the position 
			of the magnetic poles has anything to do with the direction of 
			rotation of the globe.’  
			Complete and repeated sudden reversals of 
			the magnetic poles were postulated by S.K. Runcorn (1955)[32] 
			and P.M. Blackett (1956)[33].
			 
			  
			Runcorn wrote:  
				
				‘There seems no doubt that the 
				earth’s field is tied up in some way with the rotation of the 
				planet. And this leads to a remarkable finding about the earth’s 
				rotation itself...The planet has rolled about, changing the 
				location of its geographical poles.’  
			Complete reversals would change the 
			rising and setting points, west becoming east, as described in many 
			ancient sources collated in W. in C. The pioneers in paleomagnetic 
			studies, G. Folgheraiter and P.L. Mercanton 
			[34], found a reversal of the 
			earth’s magnetic field in the Central Mediterranean area in the 8th 
			century before the present era, recorded in the magnetic dip of the 
			Etruscan and Attic vases; their position in the kiln is learned from 
			the flow of glaze. This find is in harmony with the events described 
			on pp. 207-359 of W. in C. 
 Radiocarbon analysis, besides disclosing that some petroleum is of 
			recent origin and deposit, verified also the claim (W. in C., ‘The 
			Ice Age and the Antiquity of Man’) that the last glacial period 
			ended less than 10,000 years ago. One of the first and most 
			important results of the new method was the reduction of the time of 
			the last glaciation.
 
				
				‘The advance of the ice occurred about 11,000 
			years ago... Previously this maximum advance had been assumed to 
			date from about 25,000 years ago,’ reported W.F. Libby and 
			Frederick Johnson in 1952 [35]. 
				 
			Later this figure was still more reduced; furthermore, it refers to 
			the advance, not the end of the retreat of the ice cover.
			Possibly the most clear-cut case of vindication concerns the 
			antiquity I assigned to the Mesoamerican civilizations (Mayas, 
			Toltecs, Olmecs).  
			  
			G. Kubler of Yale University 
			wrote (1950)[36]:  
				
				The Mesoamerican cosmology to which 
				Velikovsky repeatedly appeals for proof did not originate and 
				could not originate until about the beginning of our era. 
				 
			Kubler showed a discrepancy of over 
			1,000 years and asserted that events I ascribed to the 8th-4th 
			centuries before the present era could not have taken place until 
			rather late in the Christian era. But on December 30, 1956, the 
			National Geographical Society, on its own behalf and that of the 
			Smithsonian Institution, announced:  
				
				Atomic science has proved the ancient civilization of Mexico to be 
			some 1,000 years older than had been believed. The findings basic to 
			Middle American archaeology, artifacts dug up in La Venta, Mexico, 
			have been proved to come from a period 800 to 400 or 500 A.D., more 
			than 1,000 years later. Cultural parallels between La Venta and 
			other Mexican archaeological excavations enable scientists to date 
			one in the terms of the others.  
			Thus the new knowledge affects the 
			dating of many finds. Dr Matthew W. Sterling, Chief of the Bureau of 
			American Ethnology at the Smithsonian Institution, declared the new 
			dating the most important archaeological discovery in recent 
			history. 
 P. Drucker and his co-workers have elaborated on the subject 
			in Science (1957) and in the report of the excavation (1959)[37].
 
 H.E. Suess, because of an accumulation of certain 
			discrepancies in the radiocarbon dates, assumes that natural events 
			caused a radical change in the intensity of the magnetosphere and in 
			the influx of cosmic rays sometime in the second millennium before 
			the present era. Several other researchers came to the same 
			conclusion [38]. This is 
			also in harmony with the story related in my book.
 
 Oceanographic research brought several confirming data.
 
			  
			H. Pettersson of Goteborg found so much nickel in clay of the oceanic 
			bed that he inferred that at some time in the past there had been a 
			prodigious fall of meteorites [39]. 
			In W. in C., the descent of enormous trains of meteorites and 
			meteoric dust and ash (pp. 51ff) of land and sea is narrated, with 
			reliance on ancient sources.  
			  
			In 1958, J.L. Worzel found a layer of 
			white ash, 5 to 30 cm thick, very close to the bottom, evenly spread 
			over an enormous area of the ocean bed in the Pacific, and he 
			thought of a ‘fiery end of bodies of cosmic origin’[40]. 
			 
			  
			M. Ewing cites evidence that the same ash layer of ‘remarkable 
			uniformity of thickness’ found by Worzel in the Pacific underlies 
			all oceans and assumes ‘a cometary collision’[41].
			 
			  
			It could hardly be without some recorded 
			consequences of global extent,’ Ewing concluded. To this a line from 
			W. in C. (‘the Darkness’) can be quoted: 
			 
				
				‘The earth entered deeper 
			into the tail of the onrushing comet’ with its ‘sweeping gases, 
			dust, and cinders’ and ‘the dust sweeping in from interplanetary 
			space.’  
			In 1950 a past collision of the earth with a comet was denied, and 
			comets were also regarded as very tenuous and light masses incapable 
			of causing much damage [42]. R. Wildt claimed that the largest comet 
			would have a mass equal to one millionth of that of Venus 
			[42]. But N. T. Bobrovnikoff 
			(1951)[43] Director of 
			Perkins Observatory, took a different view. Several comets seen in 
			the 19th century moved in very similar orbits and ‘in all 
			probability, are the result of decomposition of one single body.’
			 
			  
			He estimated that: 
			 
				
				‘If put together’ 
			these comets ‘would make something like the mass of the moon.’
				 
			Before Ewing, a cometary collision was postulated in 1957 by H. Urey 
			to explain the tektites and their distribution 
			[44]. G. Baker insists that 
			Australian tektites (australites) have lain in place no longer than 
			5,000 years [45]. 
 3,500 years ago the oceans suddenly evaporated and the water level 
			dropped about twenty feet, a fact first noted by R. Daly and later 
			confirmed by Kuenen [46]. 
			Rubin and Suess found that 3,000 years ago glaciers in the Rockies 
			suddenly increased in size [47].
 
			  
			Scandinavian and German authors date 
			Klimastürze at 1500 and 700 B.C. - the very period of great 
			perturbations described in W. in C. [48].
			
 In the ocean floor B. Heezen discovered (1960)[49] 
			a ridge split by a deep canyon, or ‘crack in the crust that runs 
			nearly twice around the earth.’
 
			  
			He wrote:  
				
				‘the discovery at this late date of 
				the midocean ridge and rift has raised fundamental questions 
				about basic geological processes and the history of the earth 
				and has even had reverberations in cosmology.’  
			Prof. Ma (Formosa) claims that there was 
			a sudden and total shift in the crust only 26 and 32 centuries ago, 
			as evidenced by the shift of marine sediments (1955) 
			[50]. It was argued that in global catastrophes of such 
			dimensions no stalactites would have remained unbroken, but within 
			one year after the atomic explosion, stalactites grew in the Gnome 
			cavern, New Mexico:  
				
				‘All nature’s processes have been 
				speeded up a billionfold.’[51]
				 
			Claude F. A. Schaeffer of College 
			de France, in his Stratigraphie Comparée 
			[52] on which he worked not 
			knowing of my simultaneous efforts, came to the conclusion that the 
			Ancient East, as documented by every excavated place from Troy to 
			the Caucasus, Persia, and Palestine-Syria, underwent immense natural 
			paroxysms, unknown in modern annals of seismology; cultures were 
			terminated, empires collapsed, trade ceased, populations were 
			decimated, the earth upheaved, the sea erupted, ash buried cities, 
			climate changed.  
			  
			Five times between the third and the 
			first millennia before the present era the cataclysms were repeated, 
			closing the Early and the Middle Bronze Ages in their wake. The 
			number of catastrophes and their dates relative to historical 
			periods coincide in Schaeffer’s estimate and in my own. From source 
			material of a different nature - archaeological - he found that the 
			greatest catastrophe terminated the Middle Kingdom in Egypt (Middle 
			Bronze). Thus we are in agreement to a day.  
			  
			The catastrophe that ended the Middle 
			Kingdom in Egypt is the starting point of Worlds in Collision 
			(and of Ages of Chaos, my reconstruction of ancient 
			chronology). 
 The recent finds in astronomy, especially in radio-astronomy (sun, 
			Venus, Jupiter), have given confirmation from above; oceanography, 
			radiocarbon, paleo-magnetism, and archaeology have carried their 
			shares from below.
 
 
			  
			Notes
 
			(References cited in "Additional 
			Examples of Correct Prognosis")  
				
					
					
					D. Menzel, Proc. Amer. Philos. 
					Soc. (October, 1952). 
					
					V. A. Bailey, Nature, May 14, 
					1960; January 7, 1961; March 25, 1961. 
					
					Menzel, Flying Saucers (Harvard 
					University Press), 1953, p. 236. 
					
					J. Q. Stuart, Princeton 
					University Observatory, in Harper’s, June, 1951. 
					
					A. Danjon, Comptes rendus des 
					séances de L’Académie des Sciences, 250 #8 (February 22, 
					1960); 250 #15 (April 11, 1960).  
					* 5a. New York Times, July 30, 
					1960. 
					
					Science, December 21, 1962.
					
					
					R. Barker, J.B.A.A., 64, 60 
					(1954). 
					
					New York Times, December 29, 
					1962 (West coast ed.). 
					
					U.P.I. dispatch from Washington, 
					D.C., in Philadelphia Inquirer, December 16, 1962. 
					
					
					E. Pettit in Hynek (ed.) 
					Astrophysics, McGraw-Hill, 1951, revised by Pettit and 
					Nicholson, Publ. Astr. Soc. of the Pacif. 67 (1955), p. 293.
					
					
					Sinton and Strong, Science, 123, 
					676 (1956). 
					
					R. A. Lyttleton, Monthly 
					Notices, Royal Astr. Soc. 121 #6 (1960); Man’s View of the 
					Universe, 1961, p. 36. 
					
					H. H. McCrea, Proceedings, Royal 
					Society, Series A, Vol. 256 (May 31, 1960). 
					
					The National Observer, December 
					31, 1962. 
					
					H. Shapley to H. M. Kallen, May 
					27, 1946. 
					
					F. Hoyle, Frontiers of 
					Astronomy, 1955, pp. 68-72. 
					
					C. R. Longwell, Am. J. of 
					Science, August, 1950. 
					
					J. B. Patton quoted by F. E. 
					Edmondson, Courier-Journal, Louisville, Ky., April 23, 1950.
					
					
					P. V. Smith, Science, October 
					24, 1952. 
					
					H. H. Nininger, Out of the Sky 
					(Dover Publ.), 1959, pp. 89 
					
					A. T. Wilson, Nature, October 6, 
					1962. 
					
					Ibid., December 17, 1960. 
					
					
					H. Brown in The Atmospheres of 
					the Earth and Planets, ed. Kuiper, 1949, p. 268. 
					
					H. Stauffer, J. Geoph. Res., 66 
					#5 (May,1961). 
					
					H. P. Wilkins, The Moon, 1955, 
					p. 42. 
					
					B. Warren and G. Fielder, 
					Nature, February 24, 1962. 
					
					N. A. Kozyrev, November 3, 1958. 
					Cf. Z. Kopal, The Moon (1960), p. 96. 
					
					H. Jeffreys, The Earth, 4th 
					ed.(1959), p. 377. 
					
					C. Payne-Gaposchkin, Popular 
					Astronomy, June, 1950. 
					
					Th. Gold, Nature, 175, 526 
					(March 26, 1955); Sky and Telescope, April, 1958. 
					
					
					A. P. Okladnikov, in Po Sledam 
					Drevnikh Kultur, Moscow, 1951; Russ. Transl. series of the 
					Peabody Museum, 1, #1(1959). 
					
					S. K. Runcorn, Scientific 
					American, September, 1955. 
					
					P.M. Blackett, Lectures on Rock 
					Magnetism, Jerusalem, 1956. 
					
					G. Folgheraiter, Archives des 
					sciences physiques et naturelles (Geneva), 1899; Journal de 
					Physique, 1899; P. L. Mercanton, Archives des science phys. 
					et nat., 1907 (t.xxiii). 
					
					F. Johnson in W. F. Libby, 
					Radiocarbon Dating (University of Chicago Press), 1952.
					
					
					G. Kubler, Am. J. of Science, 
					August, 1950. 
					
					P. Drucker, R. F. Heizer, R. J. 
					Squier, Science, July 12, 1957; Excavations at La Venta 
					(Smithsonian Institute, 1959). 
					
					Cf. a series of articles by V. 
					Milojcic, Germania, 1957 ff, E. Ralph, Am. J. of Sc., Radiac. 
					Suppl., 19559 (note to samples p214, p-215, p-216). 
					
					
					H. Pettersson, Scient. American, 
					August, 1950; Tellus, I, 1949. 
					
					J. L. Worzel, Proc. Nat. Acad. 
					of Sc., Vol. 45 #3 (March 15, 1959). 
					
					M. Ewing, Proc. Nat. Acad. of 
					Sc., Vol. 45 #3. 
					
					R. Wildt, Amer. J. of Science, 
					August, 1950. 
					
					N. T. Bobrovnikoff, in 
					Astrophysics, ed. Hynek, McGraw-Hill, 1951, pp.310-311.
					
					
					H. Urey, Nature, March 16, 1957.
					
					
					G. Baker, Nature, January 30, 
					1960. 
					
					P. H. Kuenen, Marine Geology, 
					1950, p.538. 
					
					Rubin and Suess, Science, April 
					8, 1955. 
					
					H. Games and R. Nordhagen, 
					Mitteil. der Geograph. Ges. in Munchen, XVI, H. 2 (1923), 
					pp. 13-348. R. Sernander, ‘Klimaverschlechterung, 
					Postglaciale’ in Reallexikon der Vorgeschichte, VII (1926); 
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