Trang Web Nay Coi Cung Hay, Vao Coi Thu Di

The story told by human and baboon lice

Fig.1. Nubians as tribute bring a giraffe, on whose neck a monkey climbs, the Tomb of Rekhmira, Sheikh Abd el-Qurna; XVIII dynasty (1550-1070 BC).

Research on mammalian hair and new technologies lead to surprising results. For example, what hits the town with lice the question when he uses clothes, or what we can say of baboons on the mythical land of Punt?

A survey by the group of Andrew Kitchen, University of Pennsylvania ruled that the last common ancestor of the scalp of head lice (Pediculus humanus humanus ) and body (Pediculus humanus corporis ) dates back to 190,000 years ago.
While the former is at ease in the areas covered by natural human hair, the second variety can live tissue composed of animal fibers - garments worn by men. According to Kitchen this difference sheds light on the use by man of clothes. The two subspecies of lice were differentiated with the advent of the two different habitats, that is, when man began to cover her naked body with clothing.

In a second study through analysis done on hairs of mummified baboons (genus Papio ), University of California researchers hope to clarify an ancient archaeological mystery: Where was the legendary land of Punt, which the Pharaohs of Egypt procured their wealth in gold?
The extension of the kingdom is not clear, possible areas include modern states of Yemen, Ethiopia, Eritrea or Somalia. From papyrus and merchant listings which have been preserved until we know that Egypt imported from Punt gold and silver, but also luxury goods from exotic animals.
The two specimens which are now being investigated date back to 3,000 years ago, but were probably not native to the Nile valley, but were in fact brought about by sea travel to Egypt as a royal gift or tribute to Punt.
The research will seek to determine the isotopic composition of hair (especially oxygen) baboon, this varies with the food is mostly water with the animal receives. Given that in turn depends on the composition of local geological factors, if you can determine the composition of the water drunk by the baboons you can compare the data with data from water of different geological regions of Africa, and perhaps to clarify where the animals lived in the beginning.

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The mammal and his hair

A key feature of all mammal species are the presence of hairs on the epidermis, which act as an insulating layer and play an important role in maintaining body temperature. The structure of the hair may be of taxonomic importance, in fact, many identifications in the field and forensic studies are based on the recovery and determination of tufts of hair torn from the animal. Thanks to these studies, for example it was possible to identify the skins used by "Iceman" as garments, including goat and deer. The distinctive characteristics of mammals have hair.

- The external structure of the hair: the shape and arrangement of the axis of the hair cuticular scales.
- The edge of the individual scales.
- The size and spacing of the edges of individual chips compared to the whole hair.
- The cross-sectional and longitudinal the hair and the shape of the central cavity (medulla)

Fig.1. features to describe the hair of mammals (from Backwell et al. 2009).
- provision to the axis of the strands of hair
- form of individual chips
- form the edges of individual chips
- distance of the edges of individual chips ("magnitude scales")

Figure 2. examples of fine structures observed by electron microscopy. a, b) vervet ( Chlorocebus sp.) , c) galago (Galago sp. ), d) human (Homo sapiens ), taken from Backwell et al. 2009.

With the advent of genetic techniques, if found in a hair follicle is still intact can also be made by identifying the DNA of cells.

Although Ceratina, they are made of mammalian hair is strong enough to weather the weather, remains or imprints of hair of mammals are quite rare in the geological record. During the fossilization must present special conditions (eg anoxic environment or dry), and scavengers who love Ceratina as a snack (eg beetles dermistidi) should not have access to the exhibit.

From Chinese Paleocene (ca. 59 to 56 million of years) are known fossil imprints of hair, kept in the faeces of carnivorous mammals and birds of prey. The preservation is so perfect that it was possible to observe the individual scales of the hair and give the remains at least four species, possibly including a representative of the genus Lambdopsalis a Multitubercolato relatively large for its time. The discovery confirms that these ancestors of modern mammals possessed an insulating layer made of hair.
from China is also the oldest placental mammal with a lot of hair: Eomaia scansoria . The fossil was found in the Yixian Formation (Liaoning Province), dated to the Cretaceous (125 million years). The complete skeleton preserved in anatomical connection, and is surrounded by the outline of the thick fur.

hairs are known in amber of the Miocene of the Dominican Republic and the Baltic Sea, and from the Cretaceous of France has been described the oldest example so far known. in the permafrost of Siberia and Canada have been preserved intact the nap of mammoths and other animals of the Pleistocene.
The oldest evidence of human hair known until the last year the remains were found on a mummy of the people of Chincorro (Northern Chile), dated to 9,000 years, but a hyena coprolite of more than 200,000 years old was described quello che viene interpretato come l’ impronta di peli delle prime specie di Homo .

BIBLIOGRAFIA:

BACKWELL, L.; PICKERING, R.; BROTHWELL, D.; BERGER, L.; WITCOMB, M.; MARTILL, D.; PENKMAN, K. & WILSON, A. (2009): P robable human hair found in a fossil hyaena coprolite from Gladysvale cave, South Africa. Journal of ARcheological Science 36: 1269-1276
JI, Q.; LUO, Z.-X.; YUAN, C.X.; WIBLE, J.R.; ZHANG, J.-P. & GEORGI, J.A. (2002): The earliest known eutherian mammal. Nature (416): 816-822
MENG, J. & WYSS, A.R. (1997): Multituberculate and other mammal hair recovered from Palaeogene excreta. Nature 385(6618): 712-714

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The Asti Asti el ' hilly area stretching south of Turin one of the most famous Italian wine regions, known for its red wines and sparkling wines, but few know that these beautiful hills have given birth to great men went down in history for their spirituality, for their deeds, and the their social commitment. These in fact are the hills of San Giovanni Bosco founder of the Salesians, the most famous Piedmontese saint of all time and whose popularity has reached all continents are the hills of St. Joseph Cafasso, St. Dominic Savio of Cardinal Massaja of Maria Mazzarello , Maddalena Morano, Margaret Occhiena, Allamano Giuseppe, Giuseppe Marello and Luigi Variara : men and women driven by faith and their innate tendency to goodness and brotherhood were ambassadors of peace and brotherhood.

Asti and his saints

not by chance that these hills are also known as the land of saints and spirituality. From here it passed the Francigena and Transromanica , two ancient routes traveled each year by pilgrims from Northern Europe ventured to Rome, capital of the Christian world. room in a modern style on two floors where you will find in addition to 'good pizza, fresh fish, homemade desserts and a wine cellar with regard to the selection of beers and bubbles Piedmont ed una lista di acque internazionali. Comodo il parcheggio nell'ampia piazza di fronte al locale. Ristorante pizzeria migliore pizza birra baladin buona pizza Asti Piemonte Italia migliore pizza migliori dolci ottimi vini piemontesi del terrtorio ottima pizzeria ristorante in stile moderno ampio parcheggio gruppi sindone feste di compleanno turisti menu pesce fresco pizzerie asti ristoranti asti locale asti piemontese vini birre del territorio degustazione

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