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The High Health Authority recommends against widespread screening for prostate cancer with PSA testing for men considered “at risk”. A very controversial topic. Explanations.
The establishment of a national screening of prostate cancer by PSA determination of the protein is not justified for men considered “high risk”, explains the Authority for Health (HAS) in a report published on April 4, at the request of the Ministry of Health (DGS). The definition of risk factors is not specific enough and it is difficult to identify such a population, estimated HAS.
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A new result obtained by the instrument “planet hunter” of ESO shows that there are tens of billions of planets slightly larger than Earth in the habitable zone around stars red low light.
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 It’s almost summer in the northern hemisphere of Mars .. season for a vortex, like 20 km high MRO observed by the probe.
For the first time a vortex was observed Mars from orbit of Mars by the Mars Reconnaissance Orbiter. March 14, the HiRISE camera photographed a “dust devil” as the Americans call (dust devil), amounting to 20 km high. The vortex crossed Amazonis Planitia in the northern hemisphere of the planet, approaching the summer solstice.
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A year after the earthquake and tsunami of March 11, 2011, which killed at least 20,000 dead or missing, the wounds are still vivid in Japan: tsunami-affected areas, where debris are crowded; around the territory drained Central Fukushima; inhabitants refugees away from home … Back on a double disaster, seismic and nuclear.
March 11, 2011 an earthquake of magnitude 9 occurred off the east coast of Honshu, 160 km east of the city of Sendai and 400 km north-east of Tokyo. Although Japan is a highly seismic region, the event has surprised the experts by its size and location. This is an earthquake the most violent of the globe, of the same magnitude as that which occurred in Sumatra in December 2004 resulting in the death of 280,000 people. In Japan, the official death toll is nearly 16,000 dead and over 3,000 missing-but it could be underestimated.
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These refuges attract game but also, at their periphery, human predators, which can make these reservations riskier for animals than it seems.
Protected areas where animals can live free of human-induced risks are they effective? Not necessarily meet a French-Swiss team which includes researchers from the Laboratory of Alpine Ecology. To assess their role in wildlife conservation, the researchers equipped with GPS collars and VHF radio boars and hunting dogs used in battered in the Geneva area, near a small nature reserve.
They were able to measure its impact on the game and the hunters. The results, published in the journal Ecological Applications showing that hunters are stepping up efforts in the immediate periphery of the protected area, resulting in a higher exposure on animals outside the reserve. If the adult boars have their lower mortality in the vicinity of the protected area, younger animals experiencing less enviable fate near the reserve.
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Using a baking soda type substance, the digestion of wastewater microbes can produce energy as electricity announce researchers.
Generate electricity with wastewater
The reprocessing of waste water is a costly and energy intensive. The process of “activated sludge” that uses microorganisms to purify the waters of their organic matter requires eg 1.2 KW / h per kg of organic matter. In the journal Science, a team from the University of Pennsylvania presents a new method of water treatment that could one day provide energy rather than consume, thus facilitating water treatment in poor energy.
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 Thin layers that curl themselves into tiny micro-and nanotubes whiz, with its own drive and magnet controlled by fluids. With this result, scientists are at the Leibniz Institute for Solid State and Materials Research Dresden (IFW), a world record, which has now been confirmed by the “Guinness World Records ltd”: the smallest man-made jet engines in the world.
On the certificate of “Guinness World Records ltd” it says. “The smallest made by man jet engine measures 600 nanometers in diameter and weighs 1 picogram (10 ^ kg minus 15) He was by Alex A. Solovev, Samuel Sanchez, Yongfeng Mei and Oliver G. Schmidt at the Leibniz Institute for Solid State and Materials Research (IFW Dresden), Germany, produced and demonstrated. ” It goes to the researchers but not so much set a record of the tiny new features rather than connect to it.
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Part of the X chromosome comes from Homo sapiens and Neanderthal man and is found only among people outside of Africa, says an international team of researchers.
A sequence found in all regions except sub-Saharan Africa
The comparison between human DNA and that of Neanderthal man, recently deciphered (1) , showed that there had been a cross between these two species and that Homo Sapiens have fond memories in their genome since it would consist of 1 to 4% of Neanderthal DNA (see A bit of Neanderthal in us ). But new analyzes begin to indicate how, when and where were able to achieve these inclusions, confirming the work of the team Svante Pablo (Max Planck Institute in Leipzig, Germany).
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Characteristics of the remains of the techniques used by Neanderthal Man were found near the Arctic Circle. Their dating, estimated at 8000 years after the disappearance of theoretical Neanderthal Man, raises many questions.
A culture ever discovered around the Arctic Circle
The Mousterian culture, which developed during the Middle Paleolithic (-300 000 to -33 000 years), is distinguished by the use of a very diverse range of tools on flakes. In Europe the use of these tools has been exclusively associated with Neanderthal Man but the excavations indicate that the Middle East of the Homo Sapiens also have employees.
In the journal Science, an international team, involving researchers from CNRS, this time described the presence of this culture “located at 1000 km further north than the known limit so far,” according Ludovic Slimak, a signatory to Article.
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A new genetic study indicates that most Neanderthals died about 50,000 years ago, at least 10,000 years before the supposed date of their demise.
A small group was repopulated Europe
This new perspective on the fate of Neanderthals comes from a genetic study, published in the journal Molecular Biology and Evolution. The results indicate that most Neanderthals disappeared in Europe 50,000 years ago. After that, a small group of Neanderthals has recolonised the central and western Europe, where they survived for another 10,000 years before modern humans came on the scene. Unless the Sapiens are arriving earlier in Europe, a hypothesis that has taken the body since the publication of two studies in Nature last year.
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