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'It is exciting to discover that a common group of fossils that we thought we knew a lot about may well have been hood-winking us as to their true identity, which we now realise because we have their beautifully fossilised soft-parts. A case of a 'wolf in sheep's clothing''- Professor David Siveter, University of Leicester
An international team of researchers have made an extremely rare discovery of a species of animal - related to crabs, lobsters and shrimps ? that is new to science.
Scientists from the universities of Leicester, Oxford, Imperial and Yale have announced their discovery of a new and scientifically important fossil species of ostracod in the journal, Proceedings of The Royal Society B. The research was funded by the Natural Environment Research Council.
The discovered species, which is up to 10 millimetres long, is special because it is exceptionally well preserved, complete with not only the shell but also the soft parts ? its body, limbs, eyes, gills and alimentary system. Such discoveries are extremely rare in the fossil record.
The discovery of the tiny shelled arthropod was made in 425 million year old rocks in Herefordshire, Welsh Borderland. The rocks at the site date to the Silurian period of geological time, when southern Britain was a sea area on a small continent situated in warm, southerly subtropical latitudes. The ostracods and associated marine animals living there were covered by a fall of volcanic ash that preserved them frozen in time.
Professor David Siveter, of the University of Leicester Department of Geology, said: "The two ostracod specimens discovered represent a genus and species new to science, named Pauline avibella. The genus is named in honour of a special person and avibella means 'beautiful bird', so-named because of the fancied resemblance of a prominent feature of the shell to the wing of a bird."
"Ostracods are the most abundant fossil arthropods, occurring ubiquitously as bivalved shells in rocks of the last 490 million years, and are common in most water environments today. The find is important because it is one of only a handful preserving the fossilised soft-tissues of ostracods. Its assignment to a particular group of ostracods based on knowledge of its biology is at odds with its shell form, thus urging caution in interpreting the classification of fossil ostracods based on shell characters alone."
"The preservation of soft-parts of animals is a very rare occurrence in the fossil record and allows unparalleled insight into the ancient biology, community structure and evolution of animals - key facts that that would otherwise be lost to science. The fossils known from the Herefordshire site show soft-part preservation and are of global importance."
The fossils were reconstructed 'virtually', by using a technique that involves grinding each specimen down, layer by layer, and photographing it at each stage. Ten millimetres is relatively tiny, but at an incremental level of 20 ?m (micrometres) that yields 500 slices, which can then be pieced together in a computer to provide a full, three-dimensional image of each fossil, outside and in.
Professor Siveter added: "Fossil discoveries in general help elucidate our own place in the tree of life. This discovery adds another piece of knowledge in the jigsaw of understanding the diversity and evolution of animals."
"It is exciting to discover that a common group of fossils that we thought we knew a lot about may well have been hood-winking us as to their true identity, which we now realise because we have their beautifully fossilised soft-parts. A case of a 'wolf in sheep's clothing'."
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University of Leicester: http://www.leicester.ac.uk
Thanks to University of Leicester for this article.
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Source: http://www.labspaces.net/125884/Discovery_of_tiny_fossil_new_to_science
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MOSCOW - ITAR-Tass news agency is quoting Russia's deputy foreign minister as saying that Syrian President Bashar Assad is increasingly losing control and the opposition may win.
Thursday's remarks by Mikhail Bogdanov are the first acknowledgement by a Russian official that the Syrian strongman could lose a bloody civil war.
Russia has shielded Assad from international sanctions and continued to provide it with weapons.
While Bogdanov didn't signal Moscow's readiness to edge closer to the West and approve sanctions against Assad's regime, the statement appears to reflect that Moscow has begun positioning itself for his imminent defeat.
Source: http://news.yahoo.com/report-top-russian-diplomat-says-assad-increasingly-losing-094557549.html
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Although the rapidly skyrocketing rate has slowed its ascent in recent years, the numbers are still staggering, and public health experts (and anyone with common sense) expect for long-term health risks to ensue.
Childhood diabetes type-2 is on the rise. And obese children are more likely to grow into obese adults, carrying a higher risk of heart disease, stroke, and cancer.
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But amidst the troubling conundrum, some very good news has been revealed. A number of states are reporting actual declines in childhood obesity rates. Big cities like New York and Los Angeles, and smaller spots like Anchorage, Alaska, and Kearney, Neb, have noted the change. And although the dips are small, mostly single-digit percentages, they provide the first sign that one the country?s most stubborn health problems may be relenting
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?It?s been nothing but bad news for 30 years, so the fact that we have any good news is a big story,? said Dr. Thomas Farley, the health commissioner in New York City.?
Obesity is more widely reported for low-income children than those from affluent families ? 20 percent of low-income children are obese as compared to 12 percent from affluent families ? and the current declines appear to be focused in high-income, mostly white areas.
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But Philadelphia, which has the highest big-city poverty rate in the country, reported that its obesity drop occurred mostly among minorities. According to The New York Times, obesity among 120,000 students in Philadelphia measured between 2006 and 2010 declined by 8 percent among black boys and by 7 percent among Hispanic girls, compared with a 0.8 percent decline for white girls and a 6.8 percent decline for white boys.?
Philadelphia has taken assertive action in controlling sugar and junk food in the public schools, and administrations have shifted the whole paradigm there ? comprehensive moves like offering erasers instead of candy for rewards and swapping healthy foods for sugar-heavy bake sale treats.
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Although experts say that is too early to tell whether the trend will remain, the First Lady should be proud.?
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Source: http://www.mnn.com/health/fitness-well-being/stories/childhood-obesity-declines-in-several-cities
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Astronomers have spotted seven galaxies that existed just a few hundred million years after the universe's birth, including one that may be the oldest found to date.
The potential record-holding galaxy, known as UDFj-39546284, likely existed when the universe was just 380 million years old, researchers said, and may be the farthest galaxy ever seen. The other six distant galaxies all formed within 600 million years of the Big Bang, which created our universe 13.7 billion years ago.
UDFj-39546284 was detected previously, and researchers had thought it formed just 500 million years or so after the Big Bang. The new observations, made using NASA's Hubble Space Telescope, push its probable formation time back even further.
The seven galaxies constitute the first reliable census of the epoch from 400 million to 600 million years after the universe's birth, researchers said. This census detects a steady increase in galaxies over this period, suggesting that the formation of the first stars and galaxies ? the so-called "cosmic dawn" ? happened gradually rather than suddenly.
Space news from NBCNews.com
Science editor Alan Boyle's blog: A couple of well-placed tweets have heightened interest in a Russian cosmonaut's picture of Mount Everest as seen from the International Space Station.
"The cosmic dawn was probably not a single, dramatic event," study lead author Richard Ellis, of Caltech in Pasadena, told reporters Wednesday. [ Gallery: Spectacular Hubble Photos ]
Ellis and his team pointed Hubble at a small patch of sky known as the Hubble Ultra Deep Field, which the telescope observed for many hours to build up enough light to spot extremely faint, distant objects. The researchers used Hubble's Wide Field Camera 3 to study the deep field in near-infrared wavelengths during August and September 2012.
The astronomers used special filters to measure the galaxies' redshifts ? how much their light has been stretched by the expansion of space. From the redshifts, the researchers were able to calculate the distance to each galaxy, revealing their ages.
The results "represent our cosmic roots," said Harvard astronomer Abraham Loeb, who was not involved in the study. The new Hubble data "comes from the biggest archeological dig that we have of the universe."
The team pushed Hubble to its limits, and the telescope probably won't be able to see back in time any further, Ellis said. But NASA's James Webb Space Telescope, which is slated to launch in 2018, will dig even deeper into the universe's past.
"Hubble has, in a sense, set the stage for Webb," team member Anton Koekemoer, of the Space Telescope Science Institute in Baltimore, said in a statement. "Our work indicates there is a rich field of even earlier galaxies that Webb will be able to study."
The new study has been accepted for publication in The Astrophysical Journal Letters.
Follow Space.com senior writer Mike Wall on Twitter @michaeldwall or Space.com @Spacedotcom. We're also on Facebook and Google+.
? 2012 Space.com. All rights reserved. More from Space.com.
Source: http://www.msnbc.msn.com/id/50179504/ns/technology_and_science-space/
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