70 results found.
... Subjects Can computers have ndes?When HAL, the treacherous computer in the film 2001: A Space Odyssey, was being slowly throttled by the one surviving astronaut, it tried first to negotiate. Then, as board after board of electronic components were disconnected, it burst into the old song A Bicycle Built for Two . It had learned this tune early in its silicon-based life. Surprisingly, real computers can experience similar Near-Death Experiences (NDEs). S.L . Thaler, a physicist at McDonnell Douglas, was studying neural networks designed to mimic the structure and functions of the human brain. Such neural nets can actually learn as programmers train them. As a evening avocation, Thaler devised a program that randomly severed connections in the neural net, in effect destroying the artificial brain bit by bit. When between 10 and 60% of the connections were destroyed, the net spat out only gibberish. Near 90% destruction, though, strange "whimsical" information was produced that was definitely not gibberish. In contrast, untrained neural networks generated only random numbers as they were "put down"! Evidently, HAL's tuneful demise was not so fanciful after all. (Yam, Philip; "Daisy, Daisy," Scientific American, 268:32, May 1993.) Comment. A.C . Clarke, author of 2001, has stated firmly that HAL's name was not chosen because its letters were one step away from IBM! "Pure coincidence," he has declared. Even though the odds against it are 263 to ...
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... are considered highly evolved animals so their sophisticated navigational techniques are not especially surprising. Monarch butterflies, however, are mere insects, with tiny brains (navigation-data processors) and not much in the way of the environment sensors and internal clocks required for long-distance migration. Yet, some of these colorful insects manage to flutter up to 4,000 kilometers from the eastern U.S . and Canada to their wintering grounds in Mexico. How do they do this? S.M . Perez et al have now shown that monarch butterflies are equipped with a sun compass; that is, they chart their courses by noting the sun's changing azimuth. This feat requires not only the measurement of solar azimuth but also reference to an internal clock. Humans cannot do this without artificial instruments. Furthermore, even on cloudy days, migrating monarchs fly in the proper direction (generally south-southwest). Apparently, they also have evolved a backup navigation system, perhaps a geomagnetic compass. (Perez, Sandra M., et al' "A Sun Compass in Monarch Butterflies," Nature, 387:29, 1997.) Comment. Somewhere in the tiny bodies of the monarchs are packed sun-azimuth sensors, internal clocks, magnetic-field sensors, and a nervous system that converts the incoming data into signals to the wings. Their genomes must also include map information to pass on to their progeny. From Science Frontiers #116, MAR-APR 1998 . 1998-2000 William R. Corliss ...
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... other lines extending to the desert horizon from a figure center keyed into dark spots and bright stars along the Milky Way at the same Local Sidereal Time in the same year. Finally, the directions of the long axis of each quadrangle related to the same sky in the same year at each site. Linking these findings with what is known about the Nazca culture, an agricultural-ceremonial model is presented describing how this site may have been used." (Pitluga, Phyllis Burton; The Explorer, 12:1 , Summer 1996. The Explorer is a newsletter published by the Society for Scientific Exploration. Address: P.O . Box 5848, Stanford, CA 94309-5848.) Comment. Probably the best-known terrestrial Zodiac is that alleged to be composed of natural and artificial land forms in the vicinity of Glastonbury, England. See also SF#104 for the "Pit Zodiacs" said to be arrayed in the environs of Muggenberg, Netherlands. From Science Frontiers #110, MAR-APR 1997 . 1997-2000 William R. Corliss ...
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... 107] had taken to be manmade cut, stacked blocks were no more than a type of natural rock formation." P. Andrews, the author of this article likened the regular jointing of the "wall" to neatly hexagonal prisms seen in many basalt flows. He supplied two photographs of the "wall." One was like the photo in SF#107 and showed regular joints; the second, from the same outcrop, displayed angled fractures and joints that certainly do not look like the work of humans. (Andrews, Philip; "New Zealand: Recent Ash, Ancient Wall," Geology Today , p. 136, July-August 1996. Cr. R.E . Molnar) Comments. If we receive counter-arguments from proponents of the wall's artificiality, we will add them to this dossier. A similar situation occurs with the more-famous Bimini "walls" or "roads." We have personally seen beach-rock deposits so regularly jointed that they seem man-made. From Science Frontiers #110, MAR-APR 1997 . 1997-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 97: Jan-Feb 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The "inscribed wall" at chatata, tennessee One of our favorite anomalies over the years has been the ancient "inscribed wall" at Chatata, near Cleveland, in Bradley County, Tennessee. The above quotation marks are intended to warn the reader that said wall may not be man-made, and its inscriptions may be natural rather than artificial. An old drawing of a section of the "inscribed wall" at Chatata, TN. Note the triangular marker stone projecting above ground level. The history of the Chatata wall is long and convoluted. Discovered over a century ago, new facts are still coming to light today, as reviewed by D.E . Wirth in a recent issue of The Ancient American. The wall was originally almost completely buried. It attracted attention only because its course was marked on the surface by stones projecting from the ground every 25-30 feet over a gently curving arc about 1,000 feet long. One of these surface stones seemed to be inscribed with strange symbols. Excavations, supported at first by the Smithsonian Institution, revealed a 3-ply sandstone wall-like structure seemingly cemented together by a reddish mortar. Splitting the sandstone sheets revealed diagonal rows of markings like those illustrated. At first, both wall and inscriptions were proclaimed to be artificial. More recent studies by geologists point to natural origins for the wall, the mortar, and even the inscriptions themselves. The latter ...
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... with one another and navigate through their world of grass and vegetation by laying down trails of scent-laden urine. The world of kestrels -- eaters of voles -- is one of sight. Now, voles are hard to see in the grass far below a hunting kestrel, but evolution has come to the aid of the kestrels by giving them the capability to see in the ultra-violet portion of the spectrum. Can it be only coincidence that the urine trails of the voles happen to absorb ultra-violet light strongly? Kestrels can see these trails as dark streaks in the grass below and zero in on their prey. Finnish scientists, led by E. Korpimaki at the University of Turku, have demonstrated the above ultraviolet connection by somehow acquiring enough vole urine to lay out artificial trails in voleless areas. Sure enough, hunting kestrels were attracted to the experimental site and searched and searched the artificial vole highways -- volelessly. (Aldous, Peter; "Vole's Urine Is Their Downfall," New Scientist, p. 15, February 4, 1995. Gee, Henry; "In the Eye of the Kestrel," Nature, 373:387, 1995) Comment. Even as you read this, evolution is surely helping the voles by altering the ultraviolet signature of their urine! Sure, this is a bit facetious, but predator-prey relationships are always seesawing. We see this vividly in organisms with very short generation times, such as in antibiotic-resistant malaria. From Science Frontiers #99, MAY-JUN 1995 . 1995- ...
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... of hundreds of nights worth of stellar observations over almost 30 years. In the latest number of the Journal of Sci entific Exploration, he reported some of his more perplexing sightings in the Chilean skies, two of which are related below: "At approximately 22:30 local time on January 17, 1980, I was in front of my home in the eastern suburbs of Santiago de Chile. The sky was cloudless, although there was some smog, especially in the west in the direction of downtown. Sunset had occurred at 20:55 local time. "At that time I observed a point-shaped luminous object at an elevation of about 20 degrees; it was moving at a rather slow angular velocity from southwest to west approximately. No noise was heard and it looked like an artificial satellite, except for the direction of its motion. Its brightness, color and angular velocity reminded me of the old Echo artificial satellite from the 1960s. The object disappeared from sight during the few seconds it took me to call two persons to participate in the observation. It was not apparent how the object had disappeared from view since there were no sources of obscuration evident. Having become puzzled by this observation I continued watching that same region of sky from time to time. "About fifteen minutes later (22:45 local time) and more or less in the same region where the bright light had been observed I spotted a faint luminous object moving slowly toward the zenith. During the first few seconds of observation it had the appearance of a luminous thread, oriented perpendicular to its ...
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... Science Frontiers ONLINE No. 102: Nov-Dec 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Warm lake found under antarctic ice sheet Russian scientists using "ice radar" and artificial seismic waves have discovered a vast warmwater lake under their Antarctic base. Named after the Russian base, which is located 1,300 kilometers from the South Pole, Lake Vostok lies under 3,800 meters of solid ice and, apparently, directly under the base. This remarkable body of water was reported in the journal Kyokuchi , published by the Japan Polar Research Association. The lake is 250 kilometers long, 40 wide, and 400 meters deep. Obviously, it requires some sort of explanation as to why is not frozen. Two theories have been proposed: (1 ) Heat from the earth's interior has kept it from freezing; (2 ) The lake has not yet had time enough to freeze after a temperate period that ended about 5,000 years ago. (Anonymous; "Lake Discovered beneath Antarctic Ice," The Japan Times , May 23, 1995. Cr. N. Masuya) Comment. Can there be a connection between this discovery and the ice-free Antarctica suggested by C.H . Hapgood in his Maps of the Ancient Sea Kings ? From Science Frontiers #102 Nov-Dec 1995 . 1995-2000 William R. Corliss ...
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... moon. Such LTPs (Lunar Transient Phenomena) seem also to be associated with the arrival of other terrestrial spacecraft in a few select regions of the moon, such as Mare Tranquilitatis and Gassendi. What generates these LTPs, and why only in certain areas of the lunar surface? Arkhipov's answer is in his above-quoted abstract. (Arkhipov, Alexey V.; "' Invasion Effect' on the Moon," Selenology , 13:9 , no. 1, 1994) We have never examined this journal. Comment. Reigning paradigms make the moon a barren, lifeless place. But readers of SF should be aware that the popular literature puts forth assertions that the astronauts found more than rocks on the moon, and that NASA is covering up these discoveries. Some see artificial constructions in close-up photos of the lunar surface. There are even entire books devoted to an "alien presence" on the moon! Mainstream selenologists attribute the thousands of recorded LTPs -- all legitimate scientific phenomena -- to gas releases, meteor impacts, etc., but certainly not ETs. Nevertheless, Arkhipov's correlation of LTPs and spacecraft activity should be checked out. From Science Frontiers #99, MAY-JUN 1995 . 1995-2000 William R. Corliss ...
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... opinion that they are dealing with a quarry. MG investigated the matter. We visited this alleged early quarry and discovered a few things! We thought it odd that that it's been classified as a Roman or Celtic quarry. "The site itself is located in the Sternenfels district about 25 km west of Pfortzheim/Baden-Wurttemberg. "The structure consists of: An almost central dome-hill laid in brick, surrounded by natural, hewn stones. The dome-hill (height: 15-18 m; length: 100 m; width: 60-80 m) was stacked blockwise with Keuper sandstones and clay slate. The structure's volume is estimated at about 60,000 cubic meters, which corresponds to about 100,000 tons of rock. The encompassing artificial rock walls are thought to have served as a quarry for the manufacture of the dome stratification. These rock walls were hewn artificially with tools after the quarrying of the dome stones...a place of worship? According to the map, this dome structure forms a connecting axis with other Celtic sites in this area." Summarizing additional data from the translation: (1 ) This is the largest pyramid in Europe; (2 ) The surrounding rock walls show tool marks, several petroglyphs, and Celtic symbols; and (3 ) It is suspected that this site might have been used for ritual purposes. ( Magazin fur Grenzwissenschaften , no. 5, 1993. Cr. W.-J . Langbein) From Science Frontiers #91, JAN-FEB 1994 . 1994- ...
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... always comes as a surprise when we find supposedly primitive organisms employing our highly technical concepts; for example, the jamming-avoidance techniques of electric fish (SF#89). Still another potential example has been advanced: The lowly crayfish is now thought to enlist some of our sophisticated information theory. Crayfish often live in noisy environments, where one would expect acoustical information transmission would be degraded. This would be true enough if linear information theory applied, but some, perhaps all, real situations are nonlinear. In such instances, information flow can actually be enhanced by the presence of optimized random noise. Stochastic resonance (SR) is the term applied in such cases of nonlinear statistical dynamics. J.K . Douglass et al write: "Although SR has recently been demonstrated in several artificial physical systems, it may also occur naturally, and an intriguing possibility is that biological systems have evolved the capability to exploit SR by optimizing endogenous sources of noise. Sensory systems are an obvious place to look for SR, as they excel at detecting weak signals in a noisy environment. Here we demonstrate SR using external noise applied to crayfish mechanoreceptor cells. Our results show that individual neurons can provide a physiological substrate for SR in sensory systems." Put more simply, the crayfish nervous system has the potential for cashing in on SR in noisy environments. However, the authors also remark that humans, too, accordingly to psychological experiments, seem to harness SR in the perception of ambiguous figures in noisy situations. (Douglass, John K., et al; "Noise Enhancement of ...
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... Science Frontiers ONLINE No. 70: Jul-Aug 1990 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology A RELUCTANT, LONG-OVERDUE PARADIGM SHIFT Astronomy "TAIL WAGS DOG" IN SOLAR SYSTEM Two anomalous types of stars Tilted planetary magnetic fields Biology Killer bamboos Killer whale dialects Wandering albatrosses really wander Crystal engineering Bird brain Artificial molecule shows 'sign of life' Geology Why aren't beach pebbles round? Antarctic ice sheets slipping? Natural gas explosion? Geophysics Double image of lunar crescent Elliptical halos Belgian flying triangle Lightning "attacks" vehicles Spinning ball of light inscribes crop circles General Successful predictions mean little in science ...
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... Science Frontiers ONLINE No. 21: May-Jun 1982 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Strange Megalithic Monuments in the Central Sahara The Hueyatlaco Dilemma More on Those Chinese Anchors in California Waters Astronomy The Earth's Other Moons Flattened Sun Means Trouble for Einstein Natural Lasers in the Terrestrial and Martian Skies? Magnetic Tune Played on Saturn's Rings Biology Don't Build Von Neumann Machines Artificial Panspermia on the Moon Geology Bull's Eye Pattern of Magnetic Anomalies What's Ok in the Mediterranean is Verboten in the Atlantic and the Pacific Geophysics Anomalous Sky Flash Psychology Oh Magic, Thy Name is Psi ...
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... Science Frontiers ONLINE No. 9: Winter 1979 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Cartwheels In Space An intriguing and totally unexpected wheel-shaped structure has been discovered by K. Taylor (Royal Greenwich Observatory) and D. Axon (Sussex University). Plates made with a 1-meter telescope show this curious dark pattern silhouetted against the Great Nebula in Orion. The circularity and neat set of six spokes make it seem a stellar UFO! No one knows its distance, age, or constitution. Speculation is that some interstellar winds may have created this artificial-looking object. (Anonymous; "Cartwheels in the Sky," New Scientist, 83:804, 1979.) From Science Frontiers #9 , Winter 1979 . 1979-2000 William R. Corliss ...
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... one experience that seemed to transcend the orderly ebb and flow of daily life. It's just as easy to be skeptical about these experiences -- to shrug them off -- as it is to overvalue them. There exists a unique organization dedicated to exploring this neglected body of phenomena lurking at the edges of normal human perception and experience. It is called the Exceptional Human Experience Network (EHEN). S.V . Brown, Director of R&D for the EHEN, has written a paper describing the mission of the Network. With her permission, we reproduce the paper's abstract. "The Exceptional Human Experience Network has a different approach to anomalous, out-of-the-ordinary Exceptional Experiences (EEs). By taking the emphasis off proof, or artificially trying to "cause" or stage events in the laboratory, or passively collecting case reports, we are actively trying to understand what these types of experiences and the experiencers are telling us as a whole. Inspection of the data indicates that there is a distinctive, recognizable patterning or clustering of inner and outer events: triggers, concommitants, and aftereffects which are similar across experiencer reports from over 100 different types of EEs. Preliminary study shows that those individuals who begin to explore their EEs and question conventional answers may undergo a series of similar developmental, predictable, humanizing, and transformative stages of expanding conscious awareness, which we call the Exceptional Human Experience Process (EHE Process). When EEers begin to comprehend and realize that their experiences are more than external phenomena happening "outside" of ...
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... Valdimir Gusiyev [a pseudonym] walked his dog each morning, he took a shine to a young woman he saw taking her small son to a nursery. The got talking, and within months the three were living together. "Then friends began to comment on how little Misha was the splitting image of his new father, and the local optometrist remarked that the boy had inherited his minor eye condition. Their words set Mr. Gusiyev's mind racing -- and apparently led to the discovery that there really was a family resemblance. He had fathered the child by donating sperm at the local fertility clinic in the town of Yaroslav." Gusiyev's new girl friend was a divorcee who had been married to an impotent man. She and her former husband had agreed to the artificial insemination before their divorce. A likely story? Genetic fingerprinting proved that Gusiyev was indeed the father of the child. As for the happy ending, Gusiyev and girl friend were soon married. (Blundy, Anna; "Fatherhood Takes on New Meaning for Sperm Donor," London Times, December 31, 1998. Cr. A.C .A . Silk.) From Science Frontiers #122, MAR-APR 1999 . 1999-2000 William R. Corliss ...
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... and Fire MS ENGINEERING STRUCTURES ANCIENT ASTRONOMICAL OBSERVATORIES Notable Observatory Buildings The Great Pyramid as an Astronomical Observatory MSB MISCELLANEOUS ANCIENT STRUCTURES MSB1 Miscellanous ancient structures: North America MSB2 Miscellanous ancient structures: MesoAmerica MSB3 Miscellanous ancient structures: South America MSB4 Puzzles of Inca Stone Masony MSB5 Tiahuanaco: The Baalbek of the New World MSB6 Possible Neanderthal Structures MSB7 Puzzles of the Maltese Temples MSB8 Baalbek: The Tiahuanaco of the Old World MSB9 Miscellanous ancient structures: Asia MSB10 Miscellanous ancient structures: Oceania MSB11 Miscellanous ancient structures: Africa MSC WATER-CONTROL STRUCTURES MSC1 Remarkable Ancient Aqueducts and Water-Delivery Systems MSC2 La Cumbre: Peru's Intervalley Canal MSC3 Subterranean Tunnel-Well Systems MSC4 Water-Condensing Structures MSC5 Three Notable Ancient Irrigation Systems MSC6 Curious Old Dams MSC7 Unusual Water-Containment Structures MSC8 Notable Ancient Ship Canals MSC9 Artificial Harbors MSD MENHIRS, DOLMENS, ROCKING STONES MSD1 Some Minor Enigmas Concerning Menhirs MSD2 Menhirs in Unexpected Places MSD3 Er Grah as a Foresight in an Eclipse Predictor MSD4 Dolmen-Like Structures Located Outside of Western Europe MSD5 Rocking Stones MSE EXCAVATED STRUCTURES MSE1 Lines of Pits MSE2 Puzzling Pits: A Survey MSE3 Unusual Ancient Shafts and Tunnels: A Survey MSE4 The Oak Island Shaft and Tunnels MSE5 Remarkable Ancient Mines and Quarries: A Survey MSE6 Production-Consumption Discrepancy in Prehistoric Lake Superior Copper Mining MSE7 Sculpted Hills and Mountains MSE8 Terrestrial Zodiacs and Star Maps MSF FORTS MSF1 Earthen Hilltop Forts: A survey MSF2 Notable Ancient Stone Forts: A survey MSF3 The Vitrified Stone Forts of Scotland MSH STONE ROWS, CIRCLES, AND OTHER SIMPLE STONE CONFIGURATIONS MSH1 Short Stone Rows MSH2 Long Stone Rows MSH3 Double Stone Rows ...
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... Hurricanes GHT7 Oceanic Rings and Eddies GHT8 Large-Scale Oceanic Chemical Anomalies Deep-Sea Storms Curious Drifts Gas-Hydrate Blowouts Great Whirlpools and Vortices The Gibraltar Dam Oceanic Megaplumes Gulf-Stream Reversal Oceanic Dead Zones Organized Structures in Bubble Clouds North Atlantic Oscillations El Ninos Correlated with Seismicity GHW REMARKABLE WAVE PHENOMENA GHW1 Unexplained Solitary Waves GHW2 Periodic Bands of Waves GHW3 Sudden, Unexpected Onset of High Surf GHW4 Downstream Progressive Waves in Rivers Increasing Heights of North Atlantic Waves GI INCENDIARY PHENOMENA GIC CYCLIC FIRES Forest-Fire Cycles GIS SUPPOSED SPONTANEOUS COMBUSTION Unexplained Fires GIW REMARKABLE FIRE STORMS The Peshtigo Horror GL LUMINOUS PHENOMENA GLA AURORA-LIKE PHENOMENA GLA1 Auroral Pillars: Natural Searchlight beams GLA2 Sky-Spanning Auroral Arches GLA3 Auroral Meteors: Moving Luminous Patches and Bands GLA4 Low-Level Auroras GLA5 The Odor of the Aurora GLA6 Artificial Low-Level Auroras GLA7 Geographically Displaced Auroras GLA8 Auroras with Unusual Geometries GLA9 Auroras Correlated with Thunderstorms GLA10 Auroras Correlated with Earthquakes GLA11 Auroras Correlated with Meteors GLA12 Close Relationship between Aurora Displays and Clouds GLA13 Glowing Night Skies GLA14 Transient Sky Brightenings GLA15 Bright, Luminous Patches on the Horizon GLA16 Weather or Storm Lights GLA17 Curious Folklore: Auroras and Silken Threads GLA18 Correlation of Aurora Frequency with Lunar Phase GLA19 Auroras Interacting with Lunar Halos GLA20 Electrical Effects of Auroras at the Earth's Surface GLA21 Auroras and Surface Fogs GLA22 Black Auroras GLA23 Banded Skies GLA24 Millisecond Brightness Pulsations of the Night Sky GLA25 False Dawn GLA26 Auroras Following Coastlines GLA27 Challenges to the Theory of Aurora Origin GLA28 Flash Auroras GLA29 Possible Atmospheric-Laser Emission Accompanying Auroras GLA30 Mysterious Bright Streaks in the Sky GLA31 Short-Lived, Bright, ...
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... Markings ALE6 Anomalous Red Formations ALE7 Layered Structures ALE8 Lunar Glasses ALE9 Nonrandom Distribution of Lunar Craters ALE10 Unexplained Minor Surface Features ALE11 Large-Scale Asymmetries in in Composition ALE12 Dark-Haloed Lunar Craters ALE13 Local Concentrations of Radioactivity ALE14 Scarcity of Dust and Meteoric Material ALE15 Young Lunar-Surface Ages ALE16 Local Concentration of Volatiles ALE17 Lunar Soils Older Than Associated Rocks ALE18 Problems in Dating Lunar Rocks and Soils ALE19 Compositional Differences between Earth and Moon ALE20 Apparently Anomalous Long Term Persistence of Craters ALE21 Alignment of Mascons and Lunar Moments of Inertia ALE22 Geological Changes within Historical Times ALF LUNAR LUMINOUS PHENOMENA ALF1 Infrared Anomalies ALF2 Lunar Catastrophism within Historical Times ALF3 Transient Points of Light ALF4 Localized Color Phenomena ALF5 Transient, Large-Area Luminescence ALF6 Lightning-Like Phenomena on the Moon ALL THE MOTION OF LUNAR SATELLITES ALL1 Perturbation of Artificial Lunar Satellites ALO ANOMALOUS TELESCOPIC AND VISUAL OBSERVATIONS ALO1 Doubling of Lunar Detail ALO2 Variable Spots, Streaks, and Other (Apparently) Optical Phenomena ALO3 Banded Craters ALO4 Lunar "Canals" and Lineaments ALO5 The Lunar Zodiacal Light ALO6 Distortions of the Lunar Disk ALO7 Bright Diverging Ray above the Moon ALO8 Dark Triangular Patches under the Moon ALO9 Ring of Light around the New Moon ALO10 Shortened Lunar Crescents ALO11 The Lunar Post-Sunset Horizon Glow ALW LUNAR "WEATHER" ALW1 Clouds, Mists, and Obscurations ALW2 Anomalous Ion Clouds Detected on the Lunar Surface ALX LUNAR ECLIPSE AND OCCULTATION PHENOMENA ALX1 Very Dark Lunar Eclipses ALX2 Distortions of the Earth's Shadow ALX3 Eclipse Fingers of Light ALX4 Bands and Patches on the Eclipsed Moon ALX5 Very Bright Lunar Eclipses ALX6 Thin Arcs of Light on Rim of Eclipsed Moon ...
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... Sourcebook Project Sourcebook Subjects Sophisticated Chemistry In Ancient Egypt The ancient Egyptians applied cosmetics copiously to themselves. Upper-class women (perhaps men, too) favored green, white, and black makeup. These cosmetic powders, dating from 2,000 B.C ., have been exceptionally well preserved in their original vials made of alabaster, ceramic, and wood. A team of French chemists led by P. Walter was not surprised when their analyses of these powders found crushed galena and cerussite (two ores of lead). However, they nearly dropped their test tubes when they also found chemical compounds that are extremely rare in nature; specifically, laurionite (PbOHCl) and phosgenite (Pb2 Cl2 CO3 ). In fact, these compounds are so rare naturally that the Egyptian powders must be artificial. P. Walter et al wrote: "Taken together, these results indicate that laurionite and phosgenite must have been synthesized in Ancient Egypt using wet chemistry. The Egyptians manufactured artificial leadbased compounds, and added them to the cosmetic product. The underlying chemical reactions are simple, but the whole process, including many repetitive operations, must have been quite difficult to achieve." It had been recognized earlier that the Egyptian chemists had used fire-based technology 500 years earlier (2 ,500 B.C .) to manufacture blue pigment. Wet chemistry represented another forward technological step. (Walter, P., et al; "Making Make-Up in Ancient Egypt," Nature, 397:483, 1999.) Comment. Uncowed by the successes of the ancient Egyptian ...
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