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Di seguito tutti gli interventi pubblicati sul sito, in ordine cronologico.
 
 

E’ il primo Parco Avventura nato in Emilia Romagna ed oggi il più grande d’Italia per numero di percorsi.
 
Situato nel Parco delle Fonti di Santa Lucia di Cervarezza, alle porte del Parco Nazionale dell’Appennino Tosco-Emiliano, Cerwood vi aspetta da aprile a novembre con i suoi percorsi attrezzati e il Cerwood Sport, un’area sportiva proprio in mezzo al bosco!

 
Nell’area, ultima novità del Parco, si trovano il campo da calcetto, campo di pallavolo, l’area go-kart, la pista quad elettrici e la bike park, mentre nel Parco ci si può divertire con 13 percorsi sospesi tra gli alberi, 2 nuove varianti, più di 150 giochi per bambini e adulti disseminati lungo ponti tibetani, passerelle, tunnel, tronchi oscillanti, corde, tirolesi.
 
I bambini possono sbizzarrirsi su quattro percorsi, ad un’altezza massima di due metri dal terreno.
 
Per i ragazzi e gli adulti è pronta la sfida sui 9 percorsi di difficoltà crescente: Verde, Giallo, Blu, Arancione, Rosso, Grande Tirola (più di 100 metri di discesa in carrucola), Nero, fino all’impegnativo Super Nero dove mettere alla prova le proprie capacità di coordinazione ed equilibrio. E poi l’ultimo nato, il percorso Impossibile. Il percorso Verde e quello Blu propongono due varianti, una facile e una difficile.
 
Prima di cominciare, un istruttore illustrerà le tecniche e le manovre di sicurezza.
Nell’area per il Tree Climbing si può tentare - in gruppo su prenotazione -la scalata degli alberi e muoversi tra le chiome con l’ausilio delle corde e di apposite attrezzature.
 
Dopo aver volteggiato tra gli alberi c’è tempo per una passeggiata di tutto relax nel Parco delle Fonti di Cervarezza (ingresso gratuito): il percorso circolare si completa in circa mezz’ora e non presenta particolari difficoltà. Qui, fra passerelle di legno e sentieri, si trovano anche aree attrezzate per il pic-nic con panche, tavoli e barbecue. E in un’ora di cammino si raggiunge il Lago Calamone, sotto il Monte Ventasso; il sentiero è ben segnalato e percorribile anche in mountain bike (noleggiabili presso il Parco).

Per i bambini dai due agli otto anni è presente un’area giochi dotata di pista per trattorini e macchinine a pedali, giochi gonfiabili, la mega sabbiera, tre pedane elastiche, le casette sugli alberi, il villaggio di casette di legno. E poi si può pedalare sui go-kart - rigorosamente ecologici - giocare a pallavolo, prenotare lezioni di arrampicata, orienteering e geocaching.
 
Guide Ambientali Escursionistiche abilitate o Guide Alpine organizzano attività di gruppo come escursioni, cacce al tesoro, educazione ambientale e torrentismo.
Il Ristorante del Bosco mette tutti d’accordo con i piatti della tradizione gastronomica reggiana.

Fonte: emiliaromagnaturismo.it

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A recent study confirmed that low socioeconomic status (SES) is associated with higher risk of depressive symptoms in patients with rheumatoid arthritis (RA). Statistically significant differences in race, public versus tertiary-care hospital, disability and medications were found between depressed and non-depressed patients. Study findings are reported in the February issue of Arthritis Care & Research, a journal published by Wiley-Blackwell on behalf of the American College of Rheumatology (ACR).

Roughly 1.3 million Americans are affected by RA—a chronic autoimmune disease that can cause functional limitations and may lead to physical disability in many patients. Prior studies have shown that depression is common, occurring in 13% to 42% of RA patients and is associated with worse outcomes, including greater risk of heart attack, suicide, and death. In the U.S., socioeconomic position as measured by race, gender, age, income, education and health access has significant impact on overall health.

Mary Margaretten, M.D., from the Arthritis Research Group at the University of California, San Francisco (UCSF) and lead study author explained, "We assessed the extent to which low SES influences the relationship between disability and depression in order to better identify those patients at higher risk for depression." Researchers used data obtained from the UCSF RA cohort in which participants were enrolled from an urban county, public hospital that serves the poor and a referral, tertiary-care medical center. The data included 824 visits for 466 patients, 223 from the public hospital and 243 from the tertiary-care clinic.

Analysis showed that 37% of participants had moderate to severe depression, scoring 10 or higher on the Patient Health Questionnaire (PHQ-9). The mean Health Assessment Questionnaire (HAQ) score was 1.2 and the disease activity score (DAS28) was 4, indicating fairly high levels of functional impairment and disease activity, respectively. Researchers also found significant differences between depressed and non-depressed patients related to race, public versus university hospital, functional limitation and disease modifying anti-rheumatic drug (DMARD) treatment. Differences in depression severity were not impacted by gender, age, disease duration, steroid use and dose, or biologic therapy.

Furthermore, the team found that county hospital patients also had significantly higher depression scores (PHQ-9 of 7.3) than patients at the university medical center (PHQ-9 of 5.7). An interaction existed between socioeconomic status and disability such that the association of functional limitation with depression scores was stronger for patients at the public hospital clinic compared to those at the tertiary-care clinic.

Dr. Margaretten concluded, "For the same level of disability, patients with low SES may be more likely to experience depression. Detection and documentation of the differing effects of disability on depression between patients of different socioeconomic status can help rheumatologists improve health outcomes by initiating appropriate and timely treatment for depression."

Source: EurekAlert

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By Admin (from 31/03/2011 @ 08:00:15, in ro - Stiinta si Societate, read 1172 times)

 De decenii bune, cercetatorii nu mai prididesc sa traga semnale de alarma asupra pericolului pe care il reprezinta  tutunul, nu doar asupra celor ce sunt impatimiti de „iarba dracului”, dar mai ales a fumatorilor pasivi. Iar statisticile au dovedit, de altfel, ca fumatul este responsabil pentru mai bine de trei sferturi din totalitatea cazurilor de cancer, avand o influenta nefasta asupra starii de sanatate. Dar, oricat ar parea de curios, tutunul se pare ca nu doar imbolnaveste de cancer, ci poate sa si vindece de aceasta teribila maladie, dupa cum tin sa ne asigure virusologii americani.

Cei care au realizat aceasta paradoxala descoperire sunt biologii de la Kimmel Cancer Center din Philadelphia. Condusi de dr. Hilary Koprowski, ei au utilizat frunze de tutun pentru a obtine anticorpi care recunosc si anihileaza celulele responsabile de declansarea cancerelor mamare si colorectale. Si pâna in prezent se reusise crearea in laborator a unor asemenea anticorpi, dar singurul inconvenient rezida in costurile de productie ridicate, majoritatea acestor elemente fiind fabricate prin complicate procedee de sinteza chimica si generând unele efecte adverse asupra organismului.

 "Crearea de anticorpi din plante reprezinta o metoda mai sanatoasa, mai ieftina si mai usor de aplicat decit cele precedente, spune dr. Koprowski. Savantii americani au reusit sa sintetizeze, din frunzele de tutun, un anticorp impotriva antigenului Lewis Y, aflat in celulele ce declanseaza cancerele de sân si de colon. Dupa cum au demonstrat studiile preliminare, anticorpii produsi de aceste "fabrici ale Naturii" sunt deosebit de eficienti, chiar mai buni decât cei produsi prin modalitatile standard, din celule de mamifere, reusind sa suprime cresterea celulelor tumorale in câteva saptamini.

"Aceasta tehnologie are un imens potential, putind fi adoptata oriunde in lume. Nu exclud posibilitatea ca peste 5-10 ani, tutunul sa devina principala sursa de anticorpi folosita in terapia cancerelor", crede dr. Koprowski. Singura problema e cum sa convingi marile concerne sa produca din frunzele de tutun nu tigari, ci medicamente...

Gabriel TUDOR - magazin.ro

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By Admin (from 30/03/2011 @ 14:00:59, in it - Scienze e Societa, read 1401 times)

Da aprile a ottobre il divertimento è assicurato al Parco delle 100 Avventure di Pratospilla, sull’Appennino parmense.
 
Incorniciato dalle alte cime del Parco Regionale dei Cento laghi, circondato dai boschi e dagli splendidi laghetti di origine glaciale, il parco sa incantare in tutte le stagioni.

 
Volteggiare tra gli alberi, fra tirolesi e tronchi oscillanti, non è mai stato così facile con il propedeutico “Percorso Pratica”. Cinque percorsi suddivisi in base all’età e alle capacità degli aspiranti Tarzan completano l’offerta.
 
Per i più piccini si può scegliere tra i due percorsi “Baby” pensati per bambini di altezza compresa tra i 100 e i 140 centimetri. Ponte tibetano, tubi sospesi, passerelle a pioli o a tavole sono alla loro portata.
 
Gli adulti ed i ragazzi hanno solo l’imbarazzo della scelta; basta seguire la segnaletica con il simpatico castoro, la mascotte del Parco, che conduce ai diversi percorsi.
“Spillo 1” è quel che ci vuole per lanciarsi nel divertimento, tra tronchi oscillanti, travi, ponte nepalese e la tirolese finale. Occhio al trabocchetto nel percorso “Spillo 2”, dove non si va avanti senza superare la rete verticale. E, per i temerari, c’è “Spillo 3”: altalene, ponti a due e tre cavi, fino al volo finale sulla torbiera con tirolese di 76 metri, una delle più lunghe d’Italia.

 
Tra percorsi acrobatici e passeggiate nella natura il divertimento è assicurato: nella bella stagione, da giugno a ottobre, il “Parco delle 100 Avventure” diventa un’ottima base di partenza per rilassanti passeggiate con tutta la famiglia o per un’escursione naturalistica guidata, accompagnati da personale esperto.
 
Mountain bike a noleggio sono a disposizione degli amanti della bici. Nei pressi del Parco si può inoltre praticare la pesca sportiva o dedicarsi alla raccolta dei funghi che crescono numerosi nei boschi del territorio.
Il Parco è dotato di un’area attrezzata per il pic-nic e di uno spazio gioco bimbi. Nella vicina stazione turistica di Prato Spilla è attivo un servizio di albergo-rifugio (70 posti letto), bar, ristorante self-service (250 posti) e un ampio parcheggio.

Fonte: emiliaromagnaturismo.it - Per maggiori informazioni: 100avventure.com

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By Admin (from 30/03/2011 @ 11:00:36, in en - Science and Society, read 1646 times)

Until now, scientists have thought that the process of erasing information requires energy. But a new study shows that, theoretically, information can be erased without using any energy at all. Instead, the cost of erasure can be paid in terms of another conserved quantity, such as spin angular momentum.

Scientists show how to erase information without using energy

In the study, physicists Joan Vaccaro from Griffith University in Queensland, Australia, and Stephen Barnett from the University of Strathclyde in Glasgow, UK, have quantitatively described how information can be erased without any energy, and they also explain why the result is not as contentious as it first appears. Their paper is published in a recent issue of the Proceedings of the Royal Society A.

Traditionally, the process of erasing information requires a cost that is calculated in terms of energy – more specifically, heat dissipation. In 1961, Rolf Landauer argued that there was a minimum amount of energy required to erase one bit of information, i.e. to put a bit in the logical zero state. The energy required is positively related to the temperature of the system’s thermal reservoir, and can be thought of as the system’s thermodynamic entropy. As such, this entropy is considered to be a fundamental cost of erasing a bit of information.

However, Vaccaro and Barnett have shown that an energy cost can be fully avoided by using a reservoir based on something other than energy, such as spin angular momentum. Subatomic particles have spin angular momentum, a quantity that, like energy, must be conserved. Basically, instead of heat being exchanged between a qubit and thermal reservoir, discrete quanta of angular momentum are exchanged between a qubit and spin reservoir. The scientists described how repeated logic operations between the qubit’s spin and a secondary spin in the zero state eventually result in both spins reaching the logical zero state. Most importantly, the scientists showed that the cost of erasing the qubit’s memory is given in terms of the quantity defining the logic states, which in this case is spin angular momentum and not energy.

The scientists explained that experimentally realizing this scheme would be very difficult. Nevertheless, their results show that physical laws do not forbid information erasure with a zero energy cost, which is contrary to previous studies. The researchers noted that, in practice, it will be especially difficult to ensure the system’s energy degeneracy (that different spin states of the qubit and reservoir have the exact same energy level). But even if imperfect conditions cause some energy loss, there is no fundamental reason to assume that the cost will be as large as that predicted by Landauer’s formula.

The possibility of erasing information without using energy has implications for a variety of areas. One example is the paradox of Maxwell’s demon, which appears to offer a way of violating the second law of thermodynamics. By opening and closing a door to separate hot and cold molecules, the demon supposedly extracts work from the reservoir, converting all heat into useful mechanical energy. Bennett’s resolution of the paradox in 1982 argues that the demon’s memory has to be erased to complete the cycle, and the cost of erasure is at least as much as the liberated energy. However, Vaccaro and Barnett’s results suggest that the demon’s memory can be erased at no energy cost by using a different kind of reservoir, where the cost would be in terms of spin angular momentum. In this scheme, the demon can extract all the energy from a heat reservoir as useful energy at a cost of another resource.

As the scientists explained, this result doesn't contradict historical statements of the second law of thermodynamics, which are exclusively within the context of heat and thermal reservoirs and do not allow for a broader class of reservoirs. Moreover, even though the example with Maxwell’s demon suggests that mechanical work can be extracted at zero energy cost, this extraction is associated with an increase in the information-theoretic entropy of the overall system.

“The maximization of entropy subject to a constraint need apply not only to heat reservoirs and the conservation of energy,” Vaccaro explained to PhysOrg.com.

The results could also apply to hypothetical Carnot heat engines, which operate at maximum efficiency. If these engines use angular momentum reservoirs instead of thermal reservoirs, they could generate angular momentum effort instead of mechanical work.

As for demonstrating the concept of erasing information at zero energy cost, the scientists said that it would take more research and time.

“We are currently looking at an idea to perform information erasure in atomic and optical systems, but it needs much more development to see if it would actually work in practice,” Vaccaro said.

She added that the result is of fundamental significance, and it’s not likely to have practical applications for memory devices.

“We don't see this as having a direct impact in terms of practical applications, because the current energy cost of information erasure is nowhere near Landauer's theoretical bound,” she said. “It's more a case of what it says about fundamental concepts. For example, Landauer said that information is physical because it takes energy to erase it. We are saying that the reason it is physical has a broader context than that.”

Source: PhysOrg

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By Admin (from 30/03/2011 @ 08:00:45, in ro - Stiinta si Societate, read 1931 times)

 Pretioasa matase, al carei secret de fabricatie era pastrat, odinioara, cu strictete, a devenit astazi un material la indemâna oricui, desi vesmintele croite din ea sunt la fel de apreciate. Se pare insa ca in viitor, matasea va fi utilizata nu doar pentru a-i imbraca pe cei dornici de haine elegante, ci si pentru a-i vindeca pe cei bolnavi! Potrivit unui proiect inedit, pus la punct de cercetatorii britanici, firele de matase vor stimula repararea nervilor distrusi. Deja s-a reusit cresterea unei „culturi” de celule nervoase de-a lungul unor fibre de matase artificiala, care are proprietati asemenanatoare cu pânza tesuta de paianjeni. Savantii spera ca matasea va incuraja cresterea celulelor de-a lungul nervilor sectionati, chiar si in cazul celor din coloana vertebrala, venind astfel in sprijinul a milioane de oameni paralizati. 
 

Matasea-minune, numita „spidrex”, provine de la viermi de matase modificati genetic, asa incât sa produca fibre cu insusiri speciale, care sa dea celulelor posibilitatea de a se lipi intre ele. Profesorul John Priestley, neurochirurg la Queen Mary’s School of Medicine and Dentistry din Londra, precizeaza ca firul de matase va actiona ca un „arac” pe care vor creste celulele nervoase.

Echipa de cercetatori britanici a testat deja matasea in cultura de tesut si pe animale si in ambele cazuri rezultatele au fost promitatoare. „Imaginile obtinute cu ajutorul microscopului electric, spune prof. Priestley, arata doua lucruri: procesorii colorati in rosu, care sunt fibre nervoase crescând de-a lungul firelor de matase; si celulele Schwann, colorate in albastru, care sunt foarte importante in sprijinirea regenerarii nervoase.

Atât in ceea ce priveste maduva spinarii cât si a nervilor periferici, firele de matase au stimulat cresterea nervului.” Principalul avantaj al acestui procedeu este ca firele de matase pot fi asamblate in tubulaturi complexe, pe dimensiunile nervilor sau ale „puntilor” ce trebuie completate. Britanicii spera ca aceste fire pot trata pacientii ai caror nervi periferici – cei care controleaza muschii si genereaza senzatiile – au fost sectionati, de pilda, in urma unui accident sau a unei taieturi adânci.

Sursa: magazin.ro

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By Admin (from 29/03/2011 @ 19:13:52, in en - Global Observatory, read 1880 times)

 

MSNBC host Cenk Uygur explains how the National Cancer Institute has recognized several possible medical benefits from marijuana use. This could lead to having marijuana reclassified from a Schedule 1 drug down to a Schedule III drug in which case the government could not crack down on medical marijuana shops.

US National Cancer Institute: "THE POTENTIAL BENEFITS OF MEDICINAL CANNABIS FOR PEOPLE LIVING WITH CANCER INCLUDE ANTIEMETIC EFFECTS, APPETITE STIMULATION, PAIN RELIEF AND IMPROVED SLEEP.

IN THE PRACTICE OF INTEGRATIVE ONCOLOGY, THE HEALTH CARE PROVIDER MAY RECOMMEND MEDICINAL CANNABIS NOT ONLY FOR SYMPTOM MANAGEMENT BUT ALSO FOR ITS POSSIBLE DIRECT ANTITUMOR EFFECT."

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By Admin (from 29/03/2011 @ 14:00:03, in it - Scienze e Societa, read 1288 times)

In Val d’Arda non si finisce mai di imparare, le proposte spaziano perché il territorio è vasto, nelle sue dimensioni e nei suoi significati.
 
Per gli amanti della natura il fulcro naturalistico è il Parco Monte Moria: qui pace e relax sposano divertimento e adrenalina. Il personale dell'Academy Adventure vi accompagnerà attraverso percorsi di equilibrio su tronchi e corde, vi insegnerà a riconoscere le tracce degli animali, il tiro con l’arco, l’arrampicata.

 
Per i più romantici ci sono i borghi medievali di Castell’Arquato e Vigoleno animati nelle notti di fiaba dai giullari e dai menestrelli di Ricordanze di sapori.
 
A Veleia l’affascinante sito archeologico è imperdibile nei mesi estivi, quando ospita la rassegna di Teatro Latino (1.2.3), per emozionarsi, divertirsi e commuoversi con i grandi classici.
 
Il tour dei castelli è adatto a tutti: si spazia da esperienze legate alla civiltà rurale e al Po, ad esposizioni di arte contemporanea, all’animazione del Parco delle Fiabe, a degustazioni di menù medievali con inservienti in costume.
Chi coltiva la propria interiorità e ricerca un percorso di equilibrio tra benessere e spiritualità, sosterà all’abbazia di Chiaravalle della Colomba, gioiello dell’architettura cistercense, dove i monaci producono liquori ed essenze in vendita nella piccola bottega.
 
Un’ulteriore possibilità è scoprire la vallata partendo dal suo personaggio più illustre:
a Sant’Agata si trova Villa Verdi, la dimora è la migliore chiave di lettura per comprendere il genio creativo del grande maestro.
 
Chi ama la vallata, ama le dimore nobiliari e le case di campagna, trasformate in aziende e in agriturismi, strumenti ideali per conoscere la civiltà rurale, con le loro piccole e interessanti esposizioni, con i laboratori del gusto, i gesti lenti e sempre uguali di mani esperte di chi conosce la materia, ama la natura e non tradisce la storia.
Infine è per tutti voi, sportivi, romantici, spirituali, intellettuali, una tappa ai tipici botteghini, per godere dei caldi chisolini, perfetti con salumi, formaggi e buon vino.

Fonte: piacenzaturismi.net

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By Admin (from 29/03/2011 @ 11:00:50, in en - Science and Society, read 1508 times)

The Double Chooz collaboration recently completed its neutrino detector which will see anti-neutrinos coming from the Chooz nuclear power plant in the French Ardennes. The experiment is now ready to start collecting data in order to measure fundamental neutrino properties with important consequences for particle and astro-particle physics.

Neutrinos are electrically neutral elementary particles, three of a kind plus their antiparticles. Though already postulated in 1930 their first experimental observation was made in 1956. Because of their weak interaction with other particles, matter is almost completely transparent to neutrinos and large sensitive detectors are needed to capture them.

Neutrino oscillations were a major discovery in the late 1990s with the corresponding experiments being included in the 2002 Nobel Prize. Oscillations describe in-flight transformations of different neutrino species into each other and the observation of this effect implies that neutrinos do have mass. The oscillations depend on three mixing parameters, of which two are large and have already been measured. The third one is called theta13 and is known to be smaller with an upper limit coming from a previous experiment at Chooz. The new Double Chooz detector is the first of a new generation of reactor neutrino experiments with the aim of measuring this fundamental parameter in neutrino physics which is a key area of particle physics research. The results will also have important consequences for the feasibility of future neutrino facilities which will aim for even more precise measurements.

Double Chooz consists of two identical detectors. The first one, at a distance of about 1km from the reactor cores, has now been filled and started to collect data. The number of neutrinos measured compared to the expected flux from the reactors will allow considerably improvement in the sensitivity for theta13 already in 2011. The second detector, located at a distance of 400 metres, will start operating in 2012. At this distance no significant transformation into another neutrino species is expected. By comparing the results from both detectors, theta13 can be determined with even higher precision.

Both detectors use an organic liquid scintillator, which was developed specifically for this experiment. The neutrino target in the core of the detector consists of 10 cubic metres of Gadolinium doped scintillator which can be used to tag neutrons from inverse beta decays which are induced by anti-neutrinos emitted by the reactors. The target is surrounded by three layers of other liquids in order to protect against other particles and to dampen environmental radioactivity. These liquids are contained in very thin vessels so as to minimize inactive volumes inside the detector. The target is observed by 390 immersed photomultipliers which convert the interactions into electrical signals. These signals are processed in a data acquisition system which can collect data over the next five years. The new detectors will ensure that neutrino physics will stay one the most fruitful areas of particle physics, as it has been for the past 50 years.

An essential contribution to the project was the development of the gadolinium-doped liquid scintillator by the researchers at the Max Planck Institute for Nuclear Physics in Heidelberg. Their task was to find, test, produce and purify a gadolinium compound which is solvable in an organic liquid and chemically stable for many years. In collaboration with their colleagues from Japan they checked the photomultipliers in a specially built test-bed. These central contributions will also play a crucial role for the interpretation and data analysis. Universities and research institutes from Brazil, England, France, Germany, Japan, Russia, Spain and USA comprise the Double Chooz collaboration.

Source: PhysOrg

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By Admin (from 29/03/2011 @ 08:00:55, in ro - Stiinta si Societate, read 1445 times)

 Vizitând, in vara anului 1996, Muzeul de Antichitati Egiptene din Cairo, mineralogul italian Vincenzo de Michele a observat un neobisnuit cristal galben-verzui, in mijlocul unui colier gasit la gâtul mumiei lui Tutankhamon. Bijuteria, analizata in laboratoare de specialitate, se dovedise a fi de sticla, dar ea parea mai veche decât insasi civilizatia egipteana. Facând cercetari, italianul a reusit sa gaseasca originile misteriosului cristal, in desertul Sahara, unde a mai descoperit numeroase „cioburi de sticla” asemanatoare. Dar, se punea intrebarea, cum de ajunsese sticla acolo si cine sau ce o fabricase?

Chimistul austriac Christian Koeberl s-a aratat si el pasionat de aceasta enigma si a stabilit ca sticla fusese formata in urma unei degajari de caldura atât de intense incât un singur fenomen petrecut pe Terra ar fi putut-o face: caderea unui meteorit. Dar in zona nu se distingea, nici macar in imaginile transmise de sateliti, vreo urma de impact.

Un posibil raspuns l-a oferit atunci geofizicianul american John Wasson, care a sugerat ca ar fi putut fi vorba totusi despre un meteorit urias, dar care a explodat in aer, la sute de metri inaltime, degajând o cantitate de energie colosala. „Atunci când am aflat despre acest subiect, gândul m-a dus la fenomenul Tunguska”, marturiseste Wasson. In opinia sa, e mai mult decât probabil ca explozia unui meteorit de mari dimensiuni a putut produce suficienta caldura pentru a transforma instantaneu nisipul din desert in sticla.

Bijuterii trimise de zei? 

 De altfel, atunci când a fost detonata prima bomba atomica, in New Mexico, la inceputul anului 1945, pe nisip s-a creat o pojghita subtire de sticla. Simularile realizate pe computer de catre cercetatori au dovedit ca apropierea unui meteorit de mari dimensiuni de desertul Sahara ar fi putut crea o uriasa „minge de foc” si genera o temperatura de peste 1800 grade Celsius la suprafata solului, lasând in urma un urias câmp de sticla. Pe de alta parte, istoricii sustin ca, spre deosebire de civilizatiile moderne, care au acceptat realitatea meteoritilor abia in ultimele doua secole (pâna si faimosul savant Lavoisier credea ca „este imposibil sa cada pe Terra obiecte venite din Cosmos”), vechii egipteni cunosteau fenomenul caderilor meteoritice. Mai mult decât atât, intrucât fragmentele de roca sau metal veneau din cer, ele erau considerate „mesageri ai zeilor” si venerate ca atare, ca si nisipul cu care veneau in contact si care purta amprenta lor „sacra”.

Poate ca acesta este motivul pentru care fragmentele cristalizate gasite in desert erau atât de apreciate si doar faraonii aveau dreptul sa le poarte, ca niste demni „fii ai zeilor ce salasluiesc in cer”, cum erau ei considerati...

Autor: Gabriel TUDOR - magazin.ro

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en - Video Alert (346)
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Ultimi commenti - Last comments - Ultimele comentarii:
Hi, it's Nathan!Pretty much everyone is using voice search with their Siri/Google/Alexa to ask for services and products now, and next year, it'll be EVERYONE of your customers. Imagine what you are ...
15/01/2019 @ 17:58:25
By Nathan
Now Colorado is one love, I'm already packing suitcases;)
14/01/2018 @ 16:07:36
By Napasechnik
Nice read, I just passed this onto a friend who was doing some research on that. And he just bought me lunch since I found it for him smile So let me rephrase that Thank you for lunch! Whenever you ha...
21/11/2016 @ 09:41:39
By Anonimo


Titolo

Latest NEWS @
www.TurismoAssociati.it

Non-Hodgkin lymphoma cured by CANNABIS. The video of Stan and Barb Rutner.

Dr. Joycelyn Elders, U.S. surgeon general: Myths About Medical Marijuana in The Providence Journal, 2004.

Marihuana vindeca CANCERUL: marturii despre uleiul de cocos si canabis.

Yahoo Incorporated Mail. My account recovery information is incorrect. The Password Helper says my password can't be reset online. "First time signing in here?" message.

All information in a video about Donatio Mortis Causa and The Venus Project

What is TOR browser?

Exclusive: Electric Hummer could be part of GM's move into EV trucks, SUVs - sources

U.S. energy secretary will not comply with congressional Democrats' impeachment probe

Hong Kong's leader backs police use of force as protesters plan 'illegal' march

U.S. oil major Chevron set to receive Venezuelan crude cargo: document

Protests sweep Lebanon as fury at ruling elite grows over economic corruption

Exclusive: Huawei in early talks with U.S. firms to license 5G platform - Huawei executive

Ultimele articole - Antena3.roHOROSCOP DRAGOSTE 19 OCTOMBRIE. Racii trebuie sa fie aten?i la via?a amoroasa, Balan?ele trebuie sa fie în?elegatoare în iubire

HOROSCOP. Mesajul Fecioarei Maria pentru zodii 19 octombrie. Berbecii sunt sensibili, Racii primesc semne

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HOROSCOP 19 OCTOMBRIE. Gemenii sunt vorbare?i, Scorpionii au parte de succes

CALENDAR ORTODOX 19 OCTOMBRIE. Ce sfânt mare sarbatorim astazi

Au o rela?ie interzisa. Femeia visurilor sale e casatorita cu un batrân bogata?. Se întâlnesc mereu sa faca amor, dar într-o zi fata i-a marturisit un secret incredibil: Nu sunt bogat, dar...





19/10/2019 @ 06:54:25
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