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Benvenuti in queste pagine dedicate a scienza, storia ed arte. Amelia Carolina Sparavigna, Torino

Tuesday, July 26, 2011

Longobard Necropolis near the Asti-Cuneo motorway

The largest Longobard necropolis in Italy, having 760 tombs -  and one of the most important in Europe because being of a specific century, the VII -  emerged at Sant'Albano Stura, during the works for the Asti-Cuneo motorway. A great discovery, because of the many tombs have funerary items. The necropolis was discovered in the spring 2009; just today the supervisor of Archaeological Studies, Egle Micheletto, gives the announcement, a few weeks after the conclusion of  excavations.
 http://torino.repubblica.it/cronaca/2011/07/25/news/una_necropoli_longobarda_negli_scavi_della_asti-cuneo-19567203/

Necropoli longobarda sulla Asti-Cuneo

"La più grande necropoli longobarda in Italia, ricca di 760 tombe, una tra le principali anche in Europa in quanto ascrivibile a un unico secolo, il VII, e’ emersa a Sant’Albano Stura, durante i lavori per l’autostrada Asti-Cuneo. Un ritrovamento eccezionale – anche perché più della metà delle sepolture è dotata di corredi funerari - venuto alla luce a partire dalla primavera 2009, ma di cui la soprintendente ai Beni archeologici Egle Micheletto dà notizia solo ora, a poche settimane dalla conclusione degli scavi"
http://torino.repubblica.it/cronaca/2011/07/25/news/una_necropoli_longobarda_negli_scavi_della_asti-cuneo-19567203/

The decreasing level of Toshka Lakes seen from space

The decreasing level of Toshka Lakes seen from space
by Amelia Carolina Sparavigna, Dipartimento di Fisica,
Politecnico di Torino, Torino, Italy
Abstract

Toshka Lakes are lakes recently formed in the Sahara Desert of Egypt, by the water of the Nile, conveyed from the Nasser Lake through a canal in the Toshka Depression. From space, astronauts noticed the growing of a first lake, the easternmost one, in 1998. Then additional lakes  grew in succession due west, the westernmost one between 2000 and 2001. In fact, sources of  precious information on Toshka Lakes are the pictures takes by the crews of space missions and  the satellite imagery. They show that, from 2006, the lakes started shrinking. A set of recent  images displays that the surface of the easternmost lake is strongly reduced.
More
http://arxiv.org/abs/1107.4430

The easternmost of the Toshka Lakes in 2005 (NASA imagery)

 
The same lake in 2011 (NASA imagery, March 31, 2011)


Superposition of the two images. Note the strong decreasing of the surface of the lake. 

Read the detailed discussion at Toshka Lakes  on this blog.


Friday, July 22, 2011

100 años de Machu Picchu

100 años de Machu Picchu a 100 km de indígenas aislados - ConNuestroPeru
"El 24 de julio se celebra el centenario del "descubrimiento" de Machu Picchu, la ciudadela inca en lo alto de los Andes peruanos, por el explorador y académico estadounidense Hiram Bingham. Pero al tiempo que Perú celebra el legado de los indígenas incas, también planea garantizar a las empresas de hidrocarburos el acceso a las tierras de los indígenas aislados en la reserva de Kugapakori-Nahua-Nanti, lo que supondría un riesgo extremo para sus vidas. "
More
100 años de Machu Picchu a 100 km de indígenas aislados

Un reactor que convierte la luz solar en combustible

"Investigadores estadounidenses y suizos han creado un pequeño reactor capaz de producir rápidamente combustible a partir de la luz solar, utilizando para ello agua, dióxido de carbono y óxido de cerio. El proceso es semejante al que utilizan las plantas para crecer y de él da cuenta la revista Science en su última edición. El prototipo ha sido desarrollado por un equipo formado por investigadores del Instituto de Tecnología de California (EE.UU) y de la Escuela Superior Eidgenössische Technische y el Instituto Paul Scherrer de Suiza. Opera captando los rayos del sol y concentrándolas en un cristal de cuarzo, proyectando el haz de luz sobre un óxido de metal conocido como óxido de cerio o cerio."
Desarrollan un reactor que convierte la luz solar en combustible

Thursday, July 21, 2011

Shoemaker Impact Structure

"The Shoemaker (formerly Teague) Impact Structure—located in Western Australia in a drainage basin south of the Waldburg Range—presents an other-worldly appearance in this astronaut photograph. The Shoemaker impact site is approximately 30 kilometers (19 miles) in diameter and clearly defined by concentric ring structures formed in sedimentary rocks (brown to dark brown, image center). The rocks were deformed by the impact event approximately 1.63 billion years ago (as reported by the Earth Impact Database). Other age-dating analyses of granitic rocks at the core of the structure call this age into question (Pirajno et al. 2003)."
http://eol.jsc.nasa.gov/EarthObservatory/Shoemaker_Impact_Structure.htm
"Beginning with the Mercury missions in the early 1960s, astronauts have taken photographs of the Earth. Our database tracks the locations, supporting data, and digital images for these photographs. We process images coming down from the International Space Station on a daily basis and add them to the 1,101,059 views of the Earth already made accessible on our website."

Wednesday, July 20, 2011

The gospel according to Judas

The gospel of Jesus's favourite disciple, Judas, was on show before its return to Egypt where it was found 30 years ago. "The fragile codex -- made up of 13 papyrus leaves -- has been restored with a two-million-dollar fund from the National Geographic Society (NGS) and the Waitt Institute for Historical Discovery. Its most recent owners, the Basel-based Maecenas Foundation for Ancient Art (MFAA), will now hand the codex over to the Coptic Museum in Old Cairo. The gospel, written in Coptic in the third or fourth century, is believed to be a translation of an original Greek text belonging to an early Christian sect sometime before AD180. The document offers new insights into the relation between Jesus and Judas, whose betrayal led to his capture and crucifixion. Unlike the gospels of Matthew, Mark, Luke and John, in which Judas is portrayed as a reviled traitor, the new gospel depicts him as acting on a request by Jesus to hand him over to the Romans."

The first ever ancient Egyptian epigraphy

"Following the relocation of the artefacts, a team from Yale University, the University of Bologna and the Provinciale Hogeschool Limburg, Belgium, has completed the first epigraphic and digital record of a site near Nag El-Hamdulab on the west bank of the Nile, north of Aswan. The site was discovered nearly half a century ago by the famous Egyptian Egyptologist Labib Habachi. Minister of State for Antiquities Zahi Hawass said this new and thorough study has brought to light a previously unknown Early Dynastic cycle of royal images and an early hieroglyphic inscription. This work was carried out by the Aswan-Kom Ombo Archaeological Project (AKAP)..., lead by Maria Carmela Gatto and Antonio Curci, ... Now in its seventh season, the project aims to survey and rescue the archaeology of the region between Aswan and Kom Ombo, in the southern part of Upper Egypt. Gatto said that this group of images and the short inscription—carved around 3200 BCE, at the dawn of the dynastic period—record the earliest depiction of a royal Jubilee complete of all the elements known from later documents: an Egyptian ruler wearing a recognizable crown of Egypt; “the following of Horus”; and the royal court as known it is known to have been in Early Dynastic accounts such as the Palermo Stone."
The first ever ancient Egyptian epigraphy - Ancient Egypt - Heritage - Ahram Online

Monday, July 18, 2011

Cocoons

"...a new finding of ancient wasp cocoons hidden inside the fossilized egg of a titanosaur sauropod.
The research, published July 15 in the journal Palaeontology, suggests the ancient wasps played an important role in certain food webs during the Age of Dinosaurs. The clutch of five eggs ... belonging to a titanosaur (among the largest creatures to ever walk the Earth), was discovered in 1989 in the Patagonia region of Argentina; only recently did scientists discover that one of the broken eggs contained tiny sausage-shaped structures. The size and shape of the structures, which are about an inch long and 0.3 inches wide (2-3 cm by 1 cm), most closely matched cocoons made by some species of modern wasp ...".
http://www.cbsnews.com/stories/2011/07/15/scitech/main20079883.shtml

Appelli del Santo Padre per la Somalia e il Corno d'Africa

«Con profonda preoccupazione seguo le notizie provenienti dalla regione del Corno d`Africa e in particolare dalla Somalia, colpita da una gravissima siccità e in seguito, in alcune zone, anche da forti piogge, che stanno causando una catastrofe umanitaria». Lo ha detto papa Benedetto XVI durante l'Angelus da Castel Gandolfo, ricordando le «innumerevoli persone stanno fuggendo da quella tremenda carestia in cerca di cibo e di aiuti».
«Auspico - ha poi detto facendo un appello - che cresca la mobilitazione internazionale per inviare tempestivamente soccorsi a questi nostri fratelli e sorelle già duramente provati, tra cui vi sono tanti bambini. Non manchi a queste popolazioni sofferenti - ha concluso Benedetto XVI - la nostra solidarietà e il concreto sostegno di tutte le persone di buona volontà».
http://www.ilsole24ore.com/art/notizie/2011-07-17/somalia-appello-papa-mobilitazione-143930.shtml?uuid=AaeT6toD
http://www.vatican.va/holy_father/benedict_xvi/angelus/2011/documents/hf_ben-xvi_ang_20110717_it.html