Archive for the 'Science' Category

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Mystery Cave found in Jordan Valley

cave_01An artificial underground cave, the largest in Israel, has been exposed in the Jordan Valley in the course of a survey carried out by the University of Haifa’s Department of Archaeology. Prof. Adam Zertal, who headed the excavating team, reckons that this cave was originally a large quarry during the Roman and Byzantine era and was one of its kind. Various engravings were uncovered in the cave, including cross markings, and it is assumed that this could have been an early monastery. “It is probably the site of “Galgala” from the historical Madaba Map,” Prof. Zertal says.

The enormous and striking cave covers an area of approximately 1 acre: it is some 100 meters long and about 40 meters wide. The cave is located 4 km north of Jericho. The cave, which is the largest excavated by man to be discovered in Israel, was exposed in the course of an archaeological survey that the University of Haifa has been carrying out since 1978.

As with other discoveries in the past, this exposure is shrouded in mystery. “When we arrived at the opening of the cave, two Bedouins approached and told us not to go in as the cave is bewitched and inhabited by wolves and hyenas,” Prof. Zertal relates. Upon entering, accompanied by his colleagues, he was surprised to find an impressive architectonic underground structure supported by 22 giant pillars. They discovered 31 cross markings on the pillars, an engraving resembling the zodiac symbol, Roman letters and an etching that looks like the Roman Legion’s pennant. The team also discovered recesses in the pillars, which would have been used for oil lamps, and holes to which animals that were hauling quarried stones out of the cave could have been tied.

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Scientists discover solar-like oscillations in massive star

star_01Scientists claim to have discovered a massive star 10 times the mass of Sun but with similar oscillations which could open new possibilities of probing the interiors of celestial bodies and understanding the reasons behind the fluctuations inside the Sun.

Researchers at LESIA, a laboratory of the Paris observatory (France), and AGO, a laboratory of the Lihge University (Belgium) studied the massive star — V1449 Aql (HD180642) — for more than 150 days and observed that it displays solar-like pulsations which have, so far, never been detected in any heavenly body.

The study, conducted by CoRoT space mission, launched on December 27, 2006, has been developed and operated by CNES, a French government space agency, with contribution from Austria, Belgium, Brazil, ESA (RSSD and Science Programme), Germany and Spain.

“The unprecedented high-precision photometric data gathered for this star by the CoRoT mission allows us to report the first detection of solar-like oscillations in a massive star, V1449 Aql,” said Belkacem Kevin, Department of Astrophysics, AGO, in an email interview to PTI.

The Sun oscillates (fluctuations in its diameter) at a period of around five minutes and these motions represent the superposition of literally millions of independent modes, resonating below its surface at extremely precise periods.

“They afford enormous diagnostic potential for the (otherwise invisible) internal structure and dynamics of this conveniently close star,” Kevin said.

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Woolly mammoths survived in Britain until 14,000 years ago

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Woolly mammoths survived in Britain until 14,000 years ago, around 6,000 years longer than previously thought, according to a study released Thursday.

The study should settle a raging debate over the extinction of mammoths in Europe, unleashed when fossils from an adult male and four youngsters were found in the central English county of Shropshire in 1986, its author believes.

Conventional wisdom has held that mammoths died out in northwestern Europe some 21,000 years ago during a deep freeze called “the last glacial maximum.”

But the new research, published in Britain’s Geological Journal, proves that the giant tuskers of prehistory hung on for at least another six millennia.

“Our new radiocarbon dating of the Shropshire mammoths shows they returned to Britain and survived until around 14,000 years ago,” said Adrian Lister, a professor at the Natural History Museum in London and author of the study.

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Glass frog found in Ecuador

glass_frog_01On its recent trip to the mountainous rain forests of Nangaritza, Ecuador, scientists from Conservation International’s Rapid Assessment Program (RAP) discovered seven new insects, a new lizard, and four more amphibians. Vice President of CI’s RAP group, Leeanne Alonso, said, “the species that we discovered on this expedition are fascinating and make clear how biologically important this area is – not only because of the wealth of plants and animals that inhabit it but also because of the service that it provides to local people, like clean water and the opportunities for income from ecotourism. It is crucial that it is protected properly.”

Along with the new species the scientists discovered, RAP also found a Nymphagus Chancas, a glass or crystal frog for the first time in Ecuador. The species have been recorded previously in northeastern Peru.

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