... Science Frontiers ONLINE No. 101: Sep-Oct 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Death waves and seebars A comprehensive, 12-page article on seiches appeared in the July/August issue of American Scientist, and it was awash with curious observations. A seiche (pronounced "saysh") is a rhythmic rocking motion of a body of water that has been disturbed by natural forces, such as sudden weather changes and, especially, earthquakes. A famous example of the latter seichedriving force occurred on March 27, 1964, when the Great Alaskan Earthquake sent seismic waves rippling around the globe. Fourteen minutes after this quake, the tremors reached the U.S . Gulf coast and triggered numerous seiches in bays, harbors, canals, bayous, etc. Some crest-to-trough waterlevel oscillations reached 2 meters in amplitude. Startling though these seiches were to Gulf fishermen, most seiches are wellexplained. Bodies of water that are mostly enclosed have natural frequencies of oscillation or "sloshing," just as do coffee cups and bathtubs. The Alaskan quake just operated on a larger scale than a bump to your coffee cup! Short-period oscillations in the tidal record from Puerto Princesa, Palawan Island, Philippines. These are coastal seiches, but hardly "death waves"! So far, so good. But there are exists an interesting -- and sometimes dangerous -- class of related events that affects open coastal waters. The Irish call them "death waves." In the Baltic, they are ...

... Semeru, a German scientific team noticed that the seismic waves were much more regular than one would expect from deep volcanic activity. Their recordings revealed a series of evenly spaced harmonic frequencies. They likened it to a musical instrument emitting a fundamental note accompanied by overtones. Sometimes, the fundamental tone would rise and fall, as if the mountain were playing a tune for them. The Germans, V. Schlindwein et al, postulated that the vibrations originated in a gas-filled cavity, presumably cylindrical -- something like an organ pipe -- capped at the top, with a pool of molten magma at the bottom. Volcanic vibrations resonated in this chamber and, as the magma pool rose and fell, so did the fundamental tone. Rather than a fixed organ pipe, it was a natural trombone! Unfortunately, the "earth music" was always in the infrasound range, 8 Hertz and less, and could not be heard by the researchers directly -- only their instruments could "listen." (Schneider, David; "Country Music," Scientific American, 273:28, November 1995.) Comments. There is no physical reason why such a subterranean trombone cannot play in the audible range. Such a mechanism might explain some of the mysterious hums heard in various localities, such as the Taos hum. (SF#88) Many unusual natural sounds are cataloged in Chapter GS in our catalog: Earthquakes, Tides, Unidentified Sounds. Ordering information here . Some animals can hear infrasound. Pigeons, for example, have special organs on their legs (of ...

... and harder to dismiss. Instead, the search is on for explanations of the rapid field changes. Three possibilities have been advanced -- all of them unpalatable to geophysicists: The Steens Mountain rocks are not faithful recorders of the main geomagnetic field. Should this be actually so, the whole field of paleomagnetism, including plate tectonics, is undermined, for it depends upon similar measurements. The earth's molten core can change rapidly, at least in some regions, in response to forces still unrecognized. This, of course, is not really a satisfying "explanation." The dynamo theory of the origin of the geomagnetic field is incorrect. (Coe, R.S ., et al; "New Evidence for Extraordinarily Rapid Change of the Geomagnetic Field during a Reversal," Nature, 374:687, 1995. Merrill, Ronald T.; "Principle of Least Astonishment," Nature, 374:674, 1995.) Reference. More puzzles of the geomagnetic field are provided in: Inner Earth. For details, visit: here . From Science Frontiers #101 Sep-Oct 1995 . 1995-2000 William R. Corliss ...

... 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 Does the past influence the future?R. Sheldrake's theory of morphic resonance answers this question affirmatively. For example, it predicts that once a chemical compound is synthesized it will be easier to synthesize it again in the future because the compound's "morphogenetic field" will "guide" the chemical processes along paths already established. Can you wonder why mainstream science advised that Sheldrake's book, A New Science of Life , be BURNT! Well, there was a lot of smoke but the theory survives. Nature, in fact, is full of observations, such as parallel evolution, that support the idea of morphic resonance. And in the laboratory, a few brave souls are conducting experiments that seem to confirm the theory more directly. "Using a novel laboratory approach, researchers at Yale University have been able to create a morphogenetic effect after stimulating only 100 subjects. They employed a series of trivial paper-and-pencil tasks (such as "Put an X in any one of the four boxes shown below"). Experimenters tallied how an initial group of 100 students responded to these tasks. Then they forced a second group of 100 students to respond to the tasks in a set manner (" Put an X in the third box below"). Finally, they presented the same tasks to a third group of 100 students, allowing them to complete them, as with the first group ...

... Science Frontiers ONLINE No. 93: May-Jun 1994 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology The spirit pond inscription stone Molecular clock places humans in new world 22,000-29,000 bp Astronomy Anomalous horizon glows seen on the moon From dust unto dust Biology Marine snow A REALLY ERRANT PIGEON A REALLY ERRANT SEAL Cold-blooded birds? Why snakes have forked tongues Lactating male bats Geology The nebraska sand hills: wind or water deposits? The giant crystal at the heart of the earth Geophysics Strange explosions at sasovo, in russia Just plane weird Psychology The healing of rents in the natural order Mathematics Btt and surreality ...

... yet seen anything in the English-language journals. These phenomena have a bearing on the still-enigmatic Tunguska event of 1908 -- customarily attributed to a celestial projectile of some sort -- and perhaps even those bizarre "cookie-cutter" holes found in the U.S ., Canada, Norway, and elsewhere. One of our Russian correspodents has summarized what is known about the Sasovo explosions, and we are pleased to be able to present part of his (lightly edited) letter here: "On April 12, 1991, a strange explosion took place near the Russian town of Sasova (350 km to the southeast of Moscow). After the explosion, a crater, diameter about 30 m and depth 3m, was found. At first, several ideas about its nature were proposed, but now almost all of them are abandoned, except one: that it was a tectonic (endogenic, to be exact) origin. This is proved by geophysical research in the region and a secondary, weaker explosion (a crater also appeared) taking place in 1992 in a sparsely populated area about 9 km away from the first one. For some years before the explosions, there were signs of increased tectonic activity in the region: a great number of 'fireballs' and so-called UFOs, evidence of slow ground deformation, and so on. For about several hours before the 1991 explosion, in many places, people saw numerous 'fireballs,' often accompanied by rumbling and even ground vibrations. In many houses, animals began to be anxious. Some ...

... popular media. Everyone expected that the impact of this comet on Jupiter would provide us with some very interesting phenomena, but most thought that the debris kicked up by the impacts would reveal something new about Jupiter -- not about comets, since everyone knows what they are! Instead, the long-held theory that comets are simply dirty iceballs is now questioned. Shoemaker-Levi-9 was originally classified as a comet because: (1 ) Its fragments all appeared to be surrounded by comas like all well-behaved comets; and (2 ) It was easily torn apart by Jupiter's strong gravitational field as it narrowly missed Jupiter in 1992. This is just what one would expect from a loosely compacted dirty iceball. But doubts about Shoemaker-Levi-9 's true nature have arisen because of two observations: (1 ) No water vapor has been detected in the plumes thrown up by the impacts of the fragments; and (2 ) The comet's Fragment M, which was supposed to have vaporized in 1993, as comets are wont to do, apparently did not and left a scar on Jupiter like the other fragments. So, Shoemaker-Levi-9 had no discernible ice (unlike comets; it was fragile and easily fragmented (unlike rocky asteroids); and Fragment M did not have a coma (unlike comets but like asteroids)! Was Shoemaker-Levi-9 really a comet? (Roylance, Frank D.; "Is That Really a 'Comet' Hitting Jupiter?" Baltimore Sun, July 20, 1994. ...

... out of the question. Instead, the glow was some form of reflection from dew-covered leaves, and only from certain species of trees at that. "Later nocturnal expeditions with a powerful flashlight (a proceeding that aroused dark suspicions in at least one local gamekeeper) showed that it favoured only certain types of conifer and a few shrubs such as the yew and rhododendron. The explanation lies in the contact angle of the droplets on the leaves: as this rises above 90 degrees or so, the proportion of light from the car's headlamps that is reflected back towards the occupant increases, and for angles above 140 degrees, the retroreflection becomes spectacular. Blue spruces show the glow particularly well." (Matthews, Lindsay; "Reflections on a Summer's Night," Nature, 369:441, 1994.) From Science Frontiers #95, SEP-OCT 1994 . 1994-2000 William R. Corliss ...

... Science Frontiers ONLINE No. 96: Nov-Dec 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Underwater Thumps "Scientists based on the central California coast are trying to identify the origin of a mysterious underwater sound that disturbed surfers and divers for three weeks -- and then just as mysteriously disappeared. "The sound, made up of thumps occurring at 10-second intervals, was compared by one diver to five or six giant bongo drums going off simultaneously. Most experts have concluded that it was of human origin." As usual in such cases, no governmental or military sources knew anything about the thumps. (Shurkin, Joel N.; "Underwater Thumps Baffle Ocean Scientists," Nature, 371: 274, 1994.) From Science Frontiers #96, NOV-DEC 1994 . 1994-2000 William R. Corliss ...

... right: "fission" not "fusion." A recent number of Science News carries an intriguing suggestion from J. Brind: "Has anyone considered the possibility that the anomaly of "cold fusion" experiments -- high energy yields with few neutrons or tritium nuclei -- might result from a case of mistaken identity? There are a number of nuclear fission reactions that produce neither neutrons nor tritium, yet yield large quantities of energy." One such reaction is: 7Li+ 1H = 2(4He)+ 17.3 MeV. This is a very clean nuclear reaction that might one day be harnessed for everyday use, given lithium's low cost and abundance. The "cold fusion" effects could well come from captures of deuterons by 6Li, which is present in natural lithium. (Brind, Joel; "Cold Fission?" Science News, 137:163, 1994.) From Science Frontiers #96, NOV-DEC 1994 . 1994-2000 William R. Corliss ...

... response of global extent." The foregoing abstract does not mention the interesting Heinrich layers that fostered the above scenario. In 1988, H. Heinrich published a paper describing a curious set of sedimentary layers found in cores drilled in the tops of the Dreizack seamounts in the eastern North Atlantic. Heinrich concluded that each of the six layers he found represented the melting of "six great armadas of icebergs." These icebergs carried debris picked up in Canada and, as they melted, deposited it on the seamounts and ocean floor. Each layer could be correlated with the major climate boundaries revealed by the Greenland ice cores. Very fittingly, these iceberg incursions are now termed "Heinrich Events." (Broecker, Wallace S.; "Massive Iceberg Discharges as Triggers for Global Climate Changes," Nature, 372:421, 1994.) From Science Frontiers #98, MAR-APR 1995 . 1995-2000 William R. Corliss ...

... 's book Rogue Asteroids and Doomsday Comets . It seems to have escaped or been ignored by the scientific press. We quote from Steel's book, in which he complains that such events get little publicity despite their ominous implications for the future of humanity. "It is therefore not surprising that the 10-meter-or-so asteroid that blew up over a largely vacant area of the western Pacific on February 1, 1994, producing an explosion equivalent to at least ten times that of the Hiroshima bomb (and possibly rather more), was not seen prior to impact. Surveillance satellites registered it as the brightest such explosion that they have picked up so far. Despite the efforts of numerous scientists in this area of study to make the military aware that such detonations do occur naturally, it appears that the U.S . President was awakened because the Pentagon thought that this incident might be a hostile nuclear explosion." From Science Frontiers #102 Nov-Dec 1995 . 1995-2000 William R. Corliss ...

... and the overlying South American continent have remained coupled since the breakup of the Gondwanaland super-continent and opening of the South Atlantic Ocean some 120 million years ago. This result also implies that large-scale convection in the mantle may be responsible for the motion of the great continental plates, such as South America, where the driving force for plate motion has not been well understood." (Dybas, Cheryl; NSFNEWS Digest 54, November 8, 1995. Cr. D. Swaner. NSF= National Science Foundation. The cyber-address for the NSFNEWS Digest is: [email protected] The computerless may read more in: VanDecar, John C., et al; "Seismic Evidence for a Fossil Mantle Plume beneath South America and Implications for Plate Driving Forces," Nature, 378:25, 1995. From Science Frontiers #103, JAN-FEB 1996 . 1996-2000 William R. Corliss ...

... on the primordial Earth." Beyond these conjectures, several other things about interplanetary dust particles bother scientists: "' What is surprising,' Walker notes, 'and still not understood, is the fact that the organic molecules we see in the dust particles are different from those previously seen in meteorites.' Another enigma is the observation of striking isotopic anomalies -- large enrichments of deuterium relative to hydrogen, as much as ten times greater than one sees in terrestrial samples -- in the particles in which Zare's group observed the organic molecules." Yes, the original dust of life may have been extraterrestrial. (Zeman, Ellen J.; "Complex Organic Molecules Found in Interplanetary Dust Particles," Physics Today, 47:17, March 1991.) Comment. Nature it seems is a great recycler. It was Walt Whitman who wrote: "And as to you, Life, I reckon you are the leavings of many deaths." From Science Frontiers #93, MAY-JUN 1994 . 1994-2000 William R. Corliss ...

... groups, one of which trends approximately parallel to the asteroid's long axis, but is offset by some 15 , the other is approximately perpendicular to this trend. The first of these directions falls along a family of planes which parallel three extensive flat facets identified by Thomas et al. The occurrence of grooves on Gaspra is consistent with other indications (irregular shape, cratering record) that this asteroid has evolved through a violent collisional history." (Veverka, J., et al; "Discovery of Grooves on Gaspra," Icarus, 107:72, 1994.) Comment. The pits along Gaspra's cracks, as on Phobos, suggest the violent expulsion of gases. Where could these gases have come from? "Sandblows" are sometimes formed during terrestrial earthquakes as natural gases and other fluids are squeezed out of the earth's porous outer crust. Could Gaspra harbor primordial methane? If so, is it biogenic or abiogenic? Reference. An entire chapter on the anomalies of asteroids can be found in our catalog: The Sun and Solar System Debris. Details here . From Science Frontiers #94, JUL-AUG 1994 . 1994-2000 William R. Corliss ...

... an unpalatable species, as with mimics of the Monarch Butterfly. That is, there seems to be no evolutionary advantage to looking alike. (Miller, Julie Ann; BioScience, inside front cover, March 1994. Miller's editorial remarks are based upon a later article by H.F . Nijhout, who also supplied the photographs. Nijhout's article explains how butterfly wing patterns may have evolved.) Comment. Cases of remarkable mimicry also occur among geographically separated species. For example, the North American Meadowlarks are dead ringers for the African Yellow-throated Longclaw. "Convergent evolution" names the phenomenon but doesn't tell how or why long chains of random mutations can come up with the same designs where there seems to be no "guidance" by the forces of natural selection. Perhaps genomes contain "subprograms" for those patterns and structures often used in biology. Of course, Sheldrake's idea of "morphic resonance" also applies here! From Science Frontiers #95, SEP-OCT 1994 . 1994-2000 William R. Corliss ...

... could have come about in an unbiased, purposeless universe. Suppose, he asks, vipers were philosophically minded. They might look at their marvelously complex fangs with the canals inside, a nearby poison gland, a poison storage reservoir with special ducts leading to the fangs, a fang-erection mechanism, a set of muscles to squeeze the poison reservoir, and a nervous system to control the whole system, and conclude that there must be an Ophidian Principle at work in the universe for vipers to end up with all these neatly interconnected biological components! Using the foregoing musings for a launch pad, Moliner assails Darwinism head on, employing the "what-good-is half-a -wing" and "complexity" arguments: "It is easy to visualise how random mutations followed by natural selection could lead to the right curvature of the fangs for better grasping of prey. But what would have been the selective advantage of the rest of the poison system if just one of its components had failed to evolve? To claim that it can be achieved through unbiased evolution is like expecting that nine independent miners can attack the core of Mount Everest from various points at the foot of the Himalayas and meet exactly in the middle without the guidance of a surveyor." (Moliner, E. Ramon; "' I Hiss Therefore I Am'," New Scientist, p. 48, November 11, 1995) Comments. We will enjoy reading the inevitable letters to New Scientist from evolutionists. Probably, too, creationists will now be quoting Moliner. Even so, we see ...

... 6. Thus, Lazzarini measured pi to a few parts in 10 million. Recently, L. Badger, Weber State University, concluded that Lazzarini probably never actually performed his experiment. His results were just too good -- too fortuitous! If the number of hits had been 1807 or 1809, pi would have been wrong by 1 part in 2,000. As it turns out, a Chinese mathematician of the 5th Century pointed out that 355/113 = 3.1415929. It is very suspicious that Lazzarini's 3408 = 355 x 16, and 1808 = 113 x 16. Badger thinks that Lazzarini's experiment was only a "thought" experiment based on the ratio 355/113. (Maddox, John; "False Calculation of Pi by Experiment," Nature, 370:323, 1994.) From Science Frontiers #96, NOV-DEC 1994 . 1994-2000 William R. Corliss ...

... is an isotope used preferentially by living organisms. Some diamonds, it is found, contain anomalously large fractions of C12, which suggests they have an organic origin. Some diamonds also contain sulfide inclusions that have sulphur-isotope ratios also symptomatic of a biological origin. The specific diamonds suspected to have an organic origin are the so-called "eclogitic" diamonds. These diamonds may have obtained their carbon and impurities from bacterial communities that once lived around hydrothermal vents that existed along ancient mid-ocean ridges. Subsequent metamorphism (heat and pressure) turned the masses of bacteria into eclogitic diamonds. So, those sparklers of yours may just be clumps of billion-year-old bacterial corpses! (Nisbet, E.G ., et al; "Can Diamonds Be Dead Bacteria?" Nature, 367:694, 1994.) Definition. Eclogites comprise a class of metamorphic rocks formed at extremely high temperatures and pressures. From Science Frontiers #95, SEP-OCT 1994 . 1994-2000 William R. Corliss ...

... of a dense, thin, ring surrounding a massive star at the end of its evolution is not easy to account for." In other words, this ring is foreign to mainstream astronomical theory. Now, with the help of the Hubble Space Telescope, two additional faint rings near 1987A have been detected. One seems to be the mirror image of the other. The bizarre part is that they are not centered on 1987A at all, like the ring mentioned above. One of the new rings seems to be in front of 1987A, the other in back -- but this is a subjective call. Speculation is rampant, and all three rings are enigmatic. Is 1987A blowing out rings of matter front and back? (Panagia, Nino; "Origins Revealed in Demise," Nature, 369:354, 1994. Cowen, R.; "Mysterious Rings Surround Supernova," Science News, 145:340, 1994.) From Science Frontiers #95, SEP-OCT 1994 . 1994-2000 William R. Corliss ...

... before. On July 26, 1983, just 6 minutes after it emerged from behind Jupiter, the Galilean satellite, Io, suddenly brightened by 50% -- a "flash" that lasted 118 seconds. Now, Io is notoriously fickle brightness-wise. Its post-eclipse brightening has long puzzled astronomers, but this short, intense flash was even more anomalous than usual. H.B . Hammel and R.M . Nelson suggest that this 1983 flash might have been the reflection of some catastrophic event occurring on the hidden half of Jupiter -- possibly the impact of some large object -- or, even more intriguing, Jovian lightning. (Hammel, H.B ., and Nelson, R.M .; "Bright Flash on Jupiter in 1983," Nature, 366:117, 1993.) Comment. Could this Jovian "lightning" actually have been an electrical spark? This thought dovetails nicely with the pair of "ghostly" infrared spots that race across Jupiter's surface in synchronism with Io's orbital motion. (See SF#91.) The two spots are believed to be the moving terminals of a gigantic electrical circuit that stretches from Jupiter's surface to Io and back again. The 1983 flash might have been a current surge in this cosmic circuit. Reference. More on Io's post-eclipse brightning can be found in AJX6 in our catalog: The Moon and the Planets. For description of the book, see here . From Science Frontiers #92, MAR-APR 1994 . 1994- ...

... pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A Line In The Sea What would create a deep green line 10 kilometers wide and stretching for hundreds of kilometers across the azure Pacific? Sailors have remarked on this line as their ships clove it. It is so large that astronauts on the Space Shuttle Atlantis have photographed it from hundreds of kilometers up. Sample analysis proves the green line to be a particularly dense concentration of phytoplankton, which thrives along the boundary where the North Equatorial Counter-current meets the colder South Equatorial Current. The microorganisms feed in the richer, cooler, sinking waters of the latter and then rise to the surface to create the green line. (Yoder, James A., et al; "A Line in the Sea," Nature, 371:689, 1994. Also: Adler, T.; "Microorganisms Create a Line in the Ocean," Science News, 146: 263, 1994.) Comment. Even more unusual lines may be created where oceanic currents meet. For example, in 1932 an immense congregation of sea snakes 10 feet wide and 60 miles long was observed in the Malacca Strait. (SF#4 ) From Science Frontiers #97, JAN-FEB 1995 . 1995-2000 William R. Corliss ...

... 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 Remnants of tunguska When something exploded over Siberia on June 30, 1908, flattening more than 2,100 square kilometers of forest, it left no crater of consequence and no obvious pieces of itself. Scientists have claimed all along that it was a comet or asteroid that detonated in the atmosphere. A few less conservative people ventured that it was an alien spaceship that blew up! G. Longo and colleagues, Universita di Bologna, have apparently found a way to determine the true nature of this invading object. They examined the resin in the conifers surrounding the site of the blast to see if any particulate debris had been trapped in the sticky goo -- much as ancient insects have been preserved in amber. "Longo and associates used a scanning electron microscope to examine 7,163 particles recovered from the site and from two control sites. They found anomalously high abundances of elements such as iron, calcium, aluminum, copper, gold, zinc, and oxygen in the Tunguska-site samples, strongly peaking around 1908." Their conclusion: The impactor was a stony meteorite of normal density. (Anonymous; "Remnants of Tunguska," Astronomy, 23:26, October 1995.) From Science Frontiers #102 Nov-Dec 1995 . 1995-2000 William R. Corliss ...

... Science Frontiers ONLINE No. 82: Jul-Aug 1992 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology A CONNECTICUT SOUTERRAIN? Did the ancient egyptians sail up the mississippi Perhaps they even reached oklahoma! Astronomy The phobos mystery object Warm, wet, fertile mars Big-bang brouhaha Biology The humongous organism contest! For some, sex = death Efficacy of homeopathy Even today natural selection is molding human populations Can you guess where this quotation comes from? Geology Did a half million meteors fall on the carolinas Geophysics An unusually complex marine light Fluid injection causes luminous phenomena Crop circle found inside a fenced compound in japan Chemistry and Physics Japanese claim generates new heat Does nature compute? ...

... 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 Information Transfer in Crayfish Mechanoreceptors by Stochastic Resonance ...