Turistas frente a la cueva de Denisova,Rusia
El análisis genético de un hueso de hace 40.000 años revela una migración desconocida de homínidos desde África
MALEN RUIZ DE ELVIRA - Madrid – 24/03/2010
The New York Times provided this chart which shows how we may be related to this hominid species.
GRAFICO – El Pais – 24-03-2010
“Una criatura que no conocemos llevó este linaje desde África y lo hizo hace menos de un millón de años”, explica Svante Pääbo , el más prestigioso especialista en ADN antiguo y director del trabajo, que publica la revista Nature.
Sin embargo, reconoce Pääbo: “No podemos decir realmente cómo era esta criatura, ni si se conoce ya por fósiles hallados en otros sitios, pero nos da una nueva imagen, mucho más compleja, de nuestro pasado”.
Prudente, Pääbo se niega a hablar de “nueva especie” y dice que en el laboratorio llaman al fósil Mujer X, simplemente, por la transmisión materna del ADN mitocondrial, que es lo que se ha estudiado, aunque no conocen su sexo.
La cueva de Denisova
“Hemos analizado el ADN mitocondrial del fragmento de dedo con las técnicas que desarrollamos para el ADN de neandertal”, explica Johannes Krause, del laboratorio de Pääbo.
La sorpresa fue que el análisis de esta máquina celular reveló grandes diferencias (hasta 400) con el ADN mitocondrial del hombre moderno y del neandertal. La conclusión es que pertenece a otro linaje, hasta ahora no identificado, posterior a la primera salida del África de un homínido.
“Los neandertales y los hombres modernos divergieron evolutivamente hace medio millón de años aproximadamente, y el ancestro común de los tres linajes, incluido el nuevo, data de un millón de años, así que estas criaturas están dos veces más distantes de nosotros que los neandertales”, dice Pääbo.
El primer grupo de homínidos que salió de África fue Homo erectus y después hubo al menos otras dos oleadas, la de los ancestros del neandertal, entre los que está en Homo antecessor de Atapuerca, hace entre 500.000 y 300.000 años, y el Homo sapiens, la especie actual, hace sólo 50.000 años. El problema es que únicamente se ha realizado análisis genético del neandertal, por lo que resulta imposible la comparación del nuevo homínido (si resulta serlo y no uno ya identificado por los fósiles) con los anteriores. Pääbo confía en que el ADN del núcleo del mismo fósil, que ya están estudiando, de muchos más datos
El yacimiento en el que se ha encontrado el hueso analizado es un abrigo -la cueva Denisova, en las montañas Altai del sur de Siberia- que ha estado habitado desde hace 100.000 años.
Situacion de los montes Altai
El estudio de los estratos de la cueva y de otros yacimientos cercanos indica que el homínido de Denisova vivió cerca, en el espacio y en el tiempo, de los neandertales y los humanos modernos.
El homínido de Denisova (también llamado mujer X) es el nombre dado a una posible nueva especie de homínido identificada a través de análisis de ADN cuyo descubrimiento se anunció en marzo de 2010. Se ha sugerido que esta nueva clase de homínido vivió entre hace 1 millón y 40.000 años, en áreas en las que también vivían neandertales y Homo sapiens,  aunque su origen se encontraría en una migración distinta a la asociada con humanos y neandertales.
Un equipo de científicos del Instituto Max Planck de Antropología Evolutiva en Leipzig, Alemania, liderado por Svante Pääbo, secuenció ADN mitocondrial (mtDNA) extraído de un fragmento de hueso proveniente del dedo de un niño que fue encontrado en las cuevas de Denisova, en los montes Altai de Siberia , en un estrato datado en 30 a 50 mil años antes del presente. En la misma capa en la que apareció el hueso, también se encontraron distintos artefactos y herramientas. El análisis del mtDNA indica la existencia de un ancestro común entre el homínido de Denisova, el Homo sapiens y el Hombre de Neandertal que pudo vivir hace aproximadamente un millón de años.  El ADN mitocondrial indica que este homínido surgió de una migración desde África distinta a la que dio origen a Homo sapiens y Neandertales y distinta del éxodo temprano del Homo erectus.
Anatomía y linaje
Se sabe poco de las características anatómicas del homínido de Denisova, ya que el único resto encontrado hasta ahora es el hueso de dedo del que se obtuvo el material genético. Se espera que futuros análisis del ADN nuclear clarifiquen si el niño pudo ser resultado de un hibridación con las poblaciones humanas y neandertales vecinas, en cuyo caso no se consideraría una nueva especie.
- ↑ a b Brown, David (March 25, 2010), “Scientists say they’ve identified new human ancestor“, Washington Post, http://www.washingtonpost.com/wp-dyn/content/article/2010/03/24/AR2010032401926_pf.html .
- ↑ a b c Krause, Johannes; Fu, Qiaomei; Good, Jeffrey M.; Viola, Bence; Shunkov, Michael V.; Derevianko, Anatoli P. & Pääbo, Svante (2010), “The complete mitochondrial DNA genome of an unknown hominin from southern Siberia”, Nature Forthcoming, doi:10.1038/nature08976 ,
- ↑ a b c Katsnelson, Alla (March 24, 2010), “New hominin found via mtDNA“, The Scientist, http://www.the-scientist.com/blog/display/57254/#ixzz0j820ioz1 .
- ↑ Wong, Kate 2010. No Bones about It: Ancient DNA from Siberia Hints at Previously Unknown Human Relative Scientific American, March 24, 2010
- La Mujer X, un nuevo linaje humano – El Pais
- El genetista español Carles Lalueza Fox opina – Mundo Neandertal
Located in Altai Krai, at the border to Altai Republic the cave is near the village of Chorny Anui (Чёрный Ануй), and some 150 km south of Barnaul, the next major city. The cave, which is approximately 28 m above the right bank of the Anuy River (a left tributary of the Ob), has formed in upper Silurian limestone and is approximately 600 m long, floor area is about 270 sq m. It contains a central chamber with side galleries. It has been described as both as a karst cave and as a sandstone cave.
In the 1970s Russian scientists discovered paleo-archeological remains in the cave which lead to further explorations. So far there have been identified twenty-two strata with archeological artifacts that cover the time from Dionisij back to about 125,000 – 180,000 years ago. The timing of the strata was accomplished by the use of thermoluminescence dating of sediments, or, in some cases, radiocarbon dating on charcoal.
Among the archeological artifacts are Mousterian and Levallois style tools attributed to Neanderthals. Beside tools researchers found decorative objects of bone, mammoth tusk, animal teeth, ostrich egg shell, fragments of a stone bracelet made of drilled, worked and polished dark green chloritolite, and pendants.
Discovery of Denisova hominin
The cave has been investigated by scientists from the Institute of Archaeology and Ethnology of Novosibirsk. Among the artifacts which had been left about 30,000 to 48,000 years ago (strata 9 -11), bones were identified. One such bone was a piece of phalanx of a child that was analyzed by Svante Pääbo and coworkers from the Max Planck Institute for Evolutionary Anthropology in Leipzig; its mitochondrial DNA revealed a structure that differs from known human patterns and has been ascribed to Denisova hominin, possibly an extinct hominin species.
Paleontology and palinology
Cave sediments are rich with remnants of animals including extinct ones. There have been found remains of 27 species of large and medium sized mammals (such as Cave Hyena, Cave Lion etc.) and 39 species of small mammals, as well as remnants of reptiles, 50 bird species and other vertebrates. Pollen in the sediments of cave is used for palaeoclimatological research.
- ^ a b c d “Денисова пещера. Denisova-Denisova Cave-Denis Cave”. http://www.showcaves.com/english/ru/caves/Denisova.html. Retrieved March 24, 2010.
- ^ a b c d e Hirst K K. “Denisova Cave (Siberia).Altai Mountain Paleolithic Site of Denisova Cave”. http://archaeology.about.com/od/dathroughdeterms/qt/denisova_cave.htm. Retrieved march 24, 2010.
- ^ a b Rex Dalton. “Fossil finger points to new human species. DNA analysis reveals lost relative from 40,000 years ago.”. http://www.nature.com/news/2010/100324/full/464472a.html. Retrieved March 24, 2010.
- ^ “Шуньков М. В, Агаджанян А. К. Палеография палеолита Денисовой пещеры. Археология, этнография и антропология Евразии. 2000.- No. 2 (2).- pages 2-20.”. http://www.altaiinter.info/project/culture/Cronology/Stone%20Age/Denis/denis01.htm. Retrieved March 28, 2010.
- ^ “Denisova Cave – abode of mysterious hominin, Wondermondo”. http://www.wondermondo.com/Countries/E/RUS/AltaiKrai/DenisovaCave.htm. Retrieved March 28, 2010.
Posted by: Loren Coleman on March 25th, 2010
The reported appearance of an Almas? Now as then?
Exciting news is all over the media of the remarkable announcement of a fourth form of hominid being discovered. This new hominin – being called everything from “X-Woman,” to less often, “Digit,” although “Denisova hominin” may end up the name of choice – is said to have lived at the same time (40,000+/- years b.p.) as humans (Homo sapiens), Neandertals (Homo neanderthalensis) and hobbits (Homo floresiensis).
In the current issue of Nature, Johannes Krause and his colleagues (J.M, Good, B. Viola, M.V. Shunkov, A.P. Derevianko, and S. Sääbo) announced the complete mitochondrial sequence of a pinky bone from Denisova Cave, in the Altai Mountains of Siberia, goes far in proving it was much different than anything recognized before. These researchers estimate the age of the little finger (digitus mínimus mánus or pinky) to be between 30,000 and 48,000 years old, living at a time when it is known that both Neanderthals and anatomically modern humans also lived in that region of southern Siberia.
Participants in a 2005 archaeological conference crowd into Denisova cave in the Altai Mountains of Siberia. A pinky bone found later in the cave now points to what could be a new human relative, distinctly different from Neanderthals or modern humans. Researchers call this potential form of hominin, “X Woman.” Photo: Johannes Krause.
“This was absolutely amazing,” says team member Svante Paabo, with the Max Planck Institute for Evolutionary Anthropology in Leipzig. Whoever this was that left “Africa 1 million years ago is some new creature that has not been on our radar screen so far.”
Ian Tattersall of the American Museum of Natural History in New York was quoted as observing, regarding the new discovery: “The human family tree has got a lot of branchings. It’s entirely plausible there are a lot of branches out there we don’t know about.”
Three human-sized hominids, plus a group of little people, inhabited the planet, humm?
“Forty thousand years ago, the planet was more crowded than we thought,” said Terence Brown of the University of Manchester.
Of course, cryptozoologists and hominologists had figured this out years ago. We also wonder if it continues to be so.
We are not alone. If there is any truth to the testimony of eyewitnesses worldwide, we appear to live amidst a variety of humanlike and apelike creatures whose existence has been largely ignored, forgotten, or denied, at least in recent history. Despite the crowding of the earth’s surface with our species, and the encroachment by Homo sapiens into the mountains, wildernesses, and wild places around the world, there is apparently ample room left over for our elusive cousins to hide. And they have done just that–for the most part. But as the reports of encounters accumulate, it has become increasingly clear that an understanding of these creatures lies not in myth, folklore, and legend, but ultimately, in reality. Loren Coleman and Patrick Huyghe, The Field Guide to Bigfoot and Other Mystery Primates (NY: Anomalist Books, 2006; as originally written in the first edition, NY: HarperCollins, 1999)
John Hawks Weblog, an outstanding site filled with his down-to-earth thoughts on any new paleoanthropology discovery, correctly notes that the new Denisova hominin, while it certainly is a “new form” of hominid, has hardly been declared full species status yet. After all, we are dealing with a pinky only, here.
John Hawks then states outloud what many of us are thinking: “One of my long-time correspondents is already calling it ‘the Yeti.’” And ending with this: “Maybe it’s a Yeti after all.”
Hawks’ correspondent might have the right idea, but these folks are using the wrong name. As I and others have written about, what we would project finding in the Denisova cave area of the Altai Mountains of Siberia and Mongolia, especially, if they remained in the area, would be Almas, Chuchunaa, and Mulen, all different localized names for unknown hairy hominins. In recent years, Almas, Chuchunaa, and Mulen would have been casually (and perhaps a bit incorrectly) called “Yetis,” or even “Siberian Snowmen.”
Some interesting indications of an unknown hominin have surfaced in the cryptozoological records for years, specifically, in south Siberia and Mongolia.
“Almas” is a Mongolian (Altaic) term for “wild man,” reported from Central Asia. “Chuchunaa” is related to the Yakut (Turkic) word for “fugitive” or “outcast,” and is said to be a giant hominid of eastern Siberia. The related form “Mulen” is an Evenki/Altaic term with origins in the word “bandit,” and also used to describe unknown, hairy bipeds from eastern Siberia.
Almas in motion, by Richard Klyver.
There is a long history of sightings of Almas and kin for this area.
Bavarian soldier Johannes Schiltberger, who was captured by the Turks in 1402 and sent to Mongol, while in the Tian Shan Mountains, became the first Westerner to see Almas. He reported two had been caught in the mountains, and were covered with hair except for their hands and faces.
As recently as 1963, Russian pediatrician Ivan Ivlov was traveling in the Altai Mountains of western Mongolia when he saw a male, a female, and a young Almas on a mountain slope. He observed them through binoculars at a distance of about a mile until they moved out of sight. Afterwards, he queried a number of his patients about the Almas and obtained some detailed stories.
Many Mulen reportedly were killed during the Russian Civil War, 1918–1921, when refugees moved into previously uninhabited areas.
In the 1920s, Tatyana Zakharova and other Evenk villagers came across a Chuchunaa while gathering berries near Khoboyuto Creek. It was also picking and eating berries, but it stood up to a full height of nearly 7 feet when it saw them and ran away swiftly. The Chuchunaa was dressed in deerskin, had long arms, a small forehead, and jutting chin. In Czarist times and during World War II, many Chuchunaa were said to have been rounded up and killed, their corpses buried secretly.
Myra Shackley in her book, Still Living? Yeti, Sasquatch and the Neanderthal Enigma (New York: Thames and Hudson, 1983), remarkably proposed the theory (almost 30 years ago) that the Chuchunaa and Mulen might be associated with the nearby fossil finds of some ambiguous teeth found in the Middle Paleolithic layers of Denisova cave in the Altai Mountains bordering Kazakhstan. Today, we understand this to be the same location for the X-Woman or the Denisova hominin.
Others have written about the affinities of the unknown hairy hominids in this part of the world, including many notables in cryptozoology/hominology, namely, Ivan T. Sanderson, B. Rinchen, P. L. Dravert, Vladimir Pushkarev, Gavriil V. Ksenofontov, Dmitri Bayanov, Boris A. Porshnev, Bernard Heuvelmans, Odette Tchernine, Michael Heaney, Chris Stringer, Ra Rabjir, Patrick Huyghe, Mark A. Hall, and Loren Coleman.
The discovery of the Denisova hominin, I encourage, should cause anthropologists to reexamine some of these stories. It has happened before.
In 2003-2004, when the discovery of the hobbits, lest we forget that between nine and eleven Homo floresiensis have been found, was announced, the tales and folklore of the island of Flores’ little ebu gogo were gathered and said to relate to the find of the little woman of Flores. Now the world is being introduced to the “X-Woman,” which actually seems to be a young female. We expect that the jokes about “Yetis” might abound. They should not hide the reality that there might be a link between the stories of Almas, Chuchunaa and Mulen and the X-Woman’s population.
Serious scientists have been open-minded in the past. And others will be tomorrow.
“The discovery that Homo floresiensis survived until so very recently, in geological terms, makes it more likely that stories of other mythical, human-like creatures such as Yetis are founded on grains of truth….Now, cryptozoology, the study of such fabulous creatures, can come in from the cold.”
~ Henry Gee, editor of Nature, in his “Flores, God and Cryptozoology,” 2004 editorial.
Mecheny (which may be yet another local name for a Chuchunaa), is here shown as drawn by artist Harry Trumbore in The Field Guide to Bigfoot and Other Mystery Primates.
What did the X-Woman look like? Let’s hope the drawings of the X-Woman will, at least, show a woman. But then again, all that has been found is a pinky, we must remember.
I am reminded of a scene from the 1999 film, Lake Placid. Upon finding a small digit from the otherwise missing body of a deputy, who was a victim of the alligator in the lake, a scientist hands it to the local law enforcement representative:
Hector: Is this the man that was killed?
Sheriff Hank Keough: He seemed…taller.
The original drawing after the first hobbit was announced, the one of LB1, as seen in the above National Geographic painting, showed the first Homo foresiensis find as a male. This is to be compared to Richard Klyver’s sketch of the Flores woman. The first fossil discovery of Homo floresiensis was of a female, not a male, of course.
The Little Lady of Flores is on the front cover of The Field Guide to Bigfoot and Other Mystery Primates , illustrated with a drawing of Homo floresiensis by wildlife artist Richard Klyver.
Speculations and discoveries will continue to change the landscape of human evolution.
Books continue to be revised. We only have to reflect that it was in 2007, when it was announced, that in 2000, Richard Leakey found an ancient complete skull of Homo erectus. It had been discovered within walking distance of an upper jaw of a Homo habilis, and both dated from the same general time period. A new study a mere three years ago said it was unlikely that H. erectus evolved from H. habilis and the below graphic was produced. It will have to be revised again.
And so it goes.
The image at the top of this blog posting is Harry Trumbore’s drawing of an Almas, from The Field Guide to Bigfoot and Other Mystery Primates.
When visiting the International Cryptozoology Museum in Portland, Maine, be certain to view the first replica of the Homo floresiensis skull to have been obtained and displayed in North America after the 2003 discovery of the Little Lady of Flores. The ICM also has full-scale museum-quality busts of Paranthropus (“Nutcracker Man”) and Australopithecus afarensis (“Lucy”), plus Dr. Grover Krantz’s full-sized recreations of the skulls of Gigantopithecus and his rare Meganthropus reconstruction (the last one he did just before he passed away).
The International Cryptozoology Museum™ leads the way in being your gateway to adventure, education and discovery.
Posted by: Loren Coleman on October 12th, 2008
Video reports are noting that Siberian hunters have found several alleged (so-called by American media) “Bigfoot” or Snowman footprints. These tracks are said to have the step length of about 6 feet or 2 meters. The reports are issuing from Salekhard, West Siberia.
I discussed “Siberian Neandertals” a year ago, in October 2007, here. The notion there are unknown hairy hominoids in Siberia is well-established.
The various reports go by different names. They are called Mecheny, Mirygdy, Chuchunaa, Mulen, or Wildmen, and some former Soviet Snowmen Commission scientists and a few Chinese in the last century have studied them. The Chuchunaa, the sometimes-raggedly-clothed, eastern version of the Mirygdy, are sighted in Eastern Siberia.
The above Asian Siberian unknown hominoid, individually named Mecheny, as drawn by artist Harry Trumbore, appears in The Field Guide to Bigfoot and Other Mystery Primates.
Denisova Cave is a rockshelter with important Middle Paleolithic and Upper Paleolithic occupations. Located in the northwestern Altai Mountains some 6 km from the village of Chernyi Anui, the site shows human occupation from the Middle Paleolithic to the Late Middle Ages, beginning ~125,000 years ago.
The cave, formed from Silurian sandstone, is ~28 meters above the right bank of the Anui River near its headwaters. It consists of several short galleries extending out from a central chamber, with a total cave area of some 270 sq m. The central chamber measures 9×11 meters, with a high arched ceiling.
Pleistocene Occupations at Denisova Cave
Excavations in the central chamber at Denisova have revealed 13 Pleistocene occupations between 30,000 and ~125,000 years bp. The chronological dates are by and large radiothermalluminescence dates (RTL) taken on sediments, with the exception of Strata 9 and 11, which have a handful of radiocarbon dates on charcoal. The RTL dates on the lowest are considered unlikely, probably only in the range of 125,000 years ago.
- Read more about Luminescence Dating
- Stratum 9, Upper Paleolithic (UP), Mousterian and Levallois, ~46,000 (OIS-2)
- Stratum 11, Initial Upper Paleolithic, Altai Mousterian, ~29,200-48,650 BP (OIS-3)
- Strata 20-12, Later Middle Paleolithic Levallois, ~69,000-155,000 BP
- Strata 21 and 22, Initial Middle Paleolithic Levallois, Mousterian, ~171,000-182,000 BP (OIS-5)
Climate data derived from palynology (pollen) and faunal taxa (animal bone) suggests that the oldest occupations were located in birch and pine forests, with some large treeless areas in higher elevations. The following periods fluctuated considerably, but the coldest temperatures occurred just before the Last Glacial Maximum, ~30,000 years ago, when a steppe environment was established.
Denisova Cave Upper Paleolithic
Although the site is for the most part stratigraphically quite intact, unfortunately a major discontinuity separates the two UP levels 9 and 11, and the contact between them is significantly disturbed, making it difficult to securely separate the dates of the artifacts in them.
Denisova is the type site for what Russian archaeologists have called the Denisova variant of Altai Mousterian, belonging to the Initial Upper Paleolithic period. Stone tools in this technology exhibit use of the parallel reduction strategy for cores, large numbers of laminar blanks and tools fashioned on large blades. Radial and parallel cores, limited numbers of true blades and a diverse series of racloirs are also identified in the stone tool assemblages.
Several remarkable art objects have been recovered within the Altai Mousterian layers of the cave, including decorative objects of bone, mammoth tusk, animal teeth, ostrich egg shell and mollusk shell. Two fragments of a stone bracelet made of drilled, worked and polished dark green chloritolite was discovered in these UP levels at Denisova.
A set of bone tools including small needles with drilled eyes, awls and pendants, and a collection of cylindrical bone beads has also been found in the Upper Paleolithic deposits. Denisova contains the earliest evidence of eyed needle manufacture in Siberia.
Human Remains at Denisova
Very few hominid remains have been recovered from Denisova, consisting of two teeth of an undetermined hominid and other small fragments of bone from the Upper Paleolithic levels. It is unclear whether these are Neanderthal or Anatomically Modern Human.
In 2010, Nature reported that a small fragment of bone, a phalange (finger bone) of a child aged between 5 and 7, and found within levels 9 and 11, had been examined by Johannes Krause and colleagues of the Neanderthal Genome Project at the Max Planck Institute for Evolutionary Anthropology. This finger was found to have mtDNA unlike either Neanderthals or Anatomically Modern Humans, and is believed to represent the descendant of a previously unrecognized hominid migration out of Africa.
- Read more about the mtDNA discovery at Denisova Cave
Denisova and Archaeology
Denisova Cave was discovered over a century ago, but its Pleistocene deposits were not recognized until 1977. Since then, extensive excavations by the Russian Academy of Sciences at Denisova and nearby sites of Ust-Karakol, Kara-Bom, Anuy 2 and Okladnikov have recorded considerable evidence about the Siberian Middle and Upper Paleolithic.
Anoikin AA, and Postnov AV. 2005 Features of raw material use in the palaeolithic industries of the mountainous Altai, Siberia, Russia. Indo-Pacific Prehistory Association Bulletin 25(3):49-56.
Derevianko AP, Postnov AV, Rybin EP, Kuzmin YV, and Keates G. 2005. The pleistocene peopling of Siberia: a review of environmental and behavioural aspects. Indo-Pacific Prehistory Association Bulletin 25(3):57-68.
Derevianko AP, and Shunkov MV. 2008. The Settling of the Ancient Man by the Example of North-Western Altai. In: Dobretsov N, Kolchanov N, Rozanov A, and Zavarzin G, editors. Biosphere Origin and Evolution: Springer. p 395-406.
Derevianko AP, Shunkov MV, and Volkov PV. 2008. A Paleolithic Bracelet From Denisova Cave. Archaeology, Ethnology and Anthropology of Eurasia 34(2):13-25
Derevianko AP, and Shunkov MV. 2009. Development of Early Human Culture in Northern Asia Paleontological Journal 43(8):881-889.
Goebel, T. 2004. The Early Upper Paleolithic of Siberia. pp. 162-195 in The Early Upper Paleolithic Beyond Western Europe, edited by PJ Brantingham, SL Kuhn and KW Kerry. University of California Press: Berkeley.
Krause J, Fu Q, Good JM, Viola B, Shunkov MV, Derevianko AP, and Paabo S. 2010. The complete mitochondrial DNA genome of an unknown hominin from southern Siberia. Nature pre-publish, 24 March 2010.
Kuzmin VV, and Orlova LA. 1998. Radiocarbon chronology of the Siberian paleolithic. Journal of World Prehistory 12(1):1-53.
Kuzmin YV. 2008. Siberia at the Last Glacial Maximum: Environment and Archaeology. Journal of Archaeological Research 16(2):163-221.
Zilhão J. 2007. The Emergence of Ornaments and Art: An Archaeological Perspective on the Origins of “Behavioral Modernity”. Journal of Archaeological Research 15(1):1-54.
More on the Siberian Upper Paleolithic
Related Glossary Entries
Denisove Cave Elsewhere
K. Kris Hirst
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