autorid: Ryan Sluman, Joon Kim, Danny Dahlquist ja Mike McCain.
9/30/09
Vanemad valetavad lastele pidevalt
Jeanna Bryner vahendab LiveScience'is ajakirjas Journal of Moral Education avaldatud uuringut, millest ilmneb, et oma lastelt ausust nõudvad lapsevanemad valetavad neile ise pidevalt."We are surprised by how often parenting by lying takes place," said study researcher Kang Lee of the University of Toronto, Canada. "Our findings showed that even the parents who most strongly promoted the importance of honesty with their children engaged in parenting by lying."
Sotsiaalne isolatsioon mõjutab vähiriske
BBC vahendab esialgu küll laborihiiri kasutades läbi viidud teadustööd, millest selgub, et sotsiaalne isolatsioon võib muuta vähkkasvajad tavalisest letaalsemaks.Researchers found the social environment can modify the biology of the disease - and lead to significant differences in outcome. Female mice stressed because they were separated from their mothers developed more and larger mammary gland tumours than more contented animals.
Lahedaid aurupunkvidinaid
Veebisaidil Oddee.com saab näha portsu veidraid ja lahedaid aurupunkvidinaid.
Värske dokumentaalfilm uurib mesilaste kadumist
Michael McCarthy tutvustab Independentis uut dokumentaalfilmi Vanishing of the Bees, milles väidetavalt paljastatakse maailma mesilasi tabanud surmalaine tõenäoline peamine põhjustaja.
The film goes on to suggest that neonicotinoid pesticides, some of them made by Bayer, one of the world's biggest chemical companies, may be behind the disappearances. The pesticides include the widely-used imidacloprid (marketed under the trade name Gaucho), which has been banned in France following pressure from beekeepers. It is still in use in Britain, the US and elsewhere.
Briti koolitüdrukut ei tapnud HPV-vaktsiin
Sarah Boseley and James Sturcke kirjutavad Guardianis, et vastupidiselt kogu maailma ajakirjanduses laineid löönud väidetele ei põhjustanud esialgsete uuringutulemuste põhjal 14-aastase Briti koolitüdruku Natalie Mortoni surma mitte inimese papilloomviiruse vastane vaktsiin (HPV-vaktsiin), vaid üks tema tõsine, vaktsineerimisega absoluutselt mitte seotud terviseprobleem.Dr Caron Grainger, joint director of public health for NHS Coventry and Coventry city council, said in a statement "it was most unlikely that the HPV vaccination was the cause of death". The preliminary results , she said, "have revealed a serious underlying medical condition which was likely to have caused death. We are awaiting further test results which will take some time."
vaata veelPäikesesüsteemis ringleb rekordkogus ohtlikku kosmilist kiirgust
David Shiga kirjutab New Scientistis, et päikeseaktiivsuse ülletavalt pikalt kestnud madalperiood on põhjustanud olukorra, kus Päikesesüsteemis esineb rekordkogus nii masinatele kui ka inimestele ohtlikku kosmilist kiirgust.Measurements by NASA's Advanced Composition Explorer (ACE) spacecraft indicate that cosmic rays are 19 per cent more abundant than any previous level seen since space flight began a half century ago. "The space era has so far experienced a time of relatively low cosmic ray activity," says Richard Mewaldt of Caltech, who is a member of the ACE team. "We may now be returning to levels typical of past centuries."
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Marsilennu suurim takistus on kosmiline kiirgus
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Marsilennu suurim takistus on kosmiline kiirgus
vaata veelMillised raamatud jõudsid Bookeri lühinimekirja
Christine Oliver teeb Guardianis ülevaate sel aastal Man Bookeri raamatuauhinna lühinimekirja ehk siis kuue finalisti sekka jõudnud autori ja raamatu kohta.The shortlist for the 2009 Man Booker prize brings together the early favourite, Hilary Mantel, with AS Byatt, Sarah Waters and two-time Booker-winning Nobel laureate JM Coetzee. Here we gather together video, audio, reviews, interviews and features so you can get to know the heavy hitters, as well as the outsiders Adam Foulds and Simon Mawer.
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Avalikustati Man Bookeri auhinna finalistid
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Avalikustati Man Bookeri auhinna finalistid
9/29/09
Aastal 2060 võib keskmine temperatuur olla 4C kõrgem
David Shukman vahendab BBCs värsket uuringut, mille kohaselt võivad globaalsed temperatuurid halvimal juhul tõusta 4C võrra juba aastaks 2060.Richard Betts of the Met Office Hadley Centre described himself as "shocked" that so much warming could occur within the lifetimes of people alive today. "If greenhouse gas emissions are not cut soon then we could see major climate changes within our own lifetimes," he said.
Viking 2 käed jäid napilt liiga lühikeseks
Irene Klotz vahendab Discovery Channeli veebisaidil ekspertarvamusi, mille kohaselt jäid marsisondil Viking 2 1976. aastal vee leidmisest tõenäoliselt puudu vaid mingid närused kümmekond sentimeetrit.NASA's Viking probes landed on Mars in 1976 to look for water and signs of life. Finding neither, Mars was abandoned for the next two decades. But if Viking 2, which touched down in an equatorial region known as Utopia Planitia, had just dug down into the soil a few more inches, scientists now think it would have hit nearly pure frozen water.
9/28/09
Galaktilistelt ääremaadelt ei tasu elu otsida
New Scientist vahendab uuringut, millega saadi kinnitus arvamusele, et kui Maa paikneks mõnes meie kodugalaktika äärepiirkonnas, poleks siin suure tõenäosusega kunagi elu tekkinud.The stars on the fringes of our galaxy have little oxygen, silicon or iron - chief ingredients of Earth-like planets - so astronomers have long doubted that life could exist there. Now they have solid evidence for their pessimism.
Kõhuussid kaitsevad allergiate eest
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BBC vahendab teadustööd, milles leiti taas kinnitus tõsiasjale, et parasiitlikud kõhuussid vähendavad inimesel riski haigestuda erinevat tüüpi allergilistesse haigustesse ning meie elukeskkonna ülisteriilseks muutumine on üheks oluliseks allergiliste haiguste sagenemise põhjuseks.Thanks to improved hygiene, practices parasitic worms have been mostly eradicated among human populations living in developed countries. However, experts believe that over millions of years of co-evolution worms have found methods to dampen down host immune responses to prolong their own survival inside humans. This relationship seems to have become so intertwined that without gut worms or other parasites, our immune system can become unbalanced, which, in turn, could contribute to the development of asthma and other allergies.
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Liivatormid levitavad ohtlikke haigustekitajaid
John Vidal kirjutab Guardianis, et laiaulatuslikud liivatormid, nagu näiteks hiljuti Austraaliat tabanu, levitavad mööda laia maailma ohtlikke haigustekitajaid, ent aitavad samal ajal vähendada kliimasoojenemise kahjulikke mõjusid.Scientists who had thought diseases were mostly transmitted by people or animals now see dust clouds as possible transmitters of influenza, Sars and foot-and-mouth, and increasingly responsible for respiratory diseases. A rise in the number of cases of asthma in children on Caribbean islands has been linked to an increase in the dust blown across the Atlantic from Africa. The asthma rate in Barbados is 17 times greater than it was in 1973, when a major African drought began, according to one major study. Researchers have also documented more hospital admissions when the dust storms are at their worst.
9/27/09
vaata veelVõõrliigid ei ole alati kurjad
Bioloogiaprofessor Mark Davis selgitab New Scientistis, et võõrliigid ei ole vastupidiselt laialt levinud veendumusele alati halvad, teeb lühikese sissevaate bioglobalisatsiooni ning joonistab välja huvitava teooria selle kohta, miks inimesed võõrliike kardavad ja ohtlikuks peavad.Some anthropologists argue that the desire to classify is inherent in humans, as we crave a sense of order. Similarly, recent evolutionary research suggests that humans are predisposed to impose group boundaries and to see outsiders as a threat. We seek every opportunity to identify with a home land, a home tribe, a home religion, a home team, and to declare everybody else the enemy. This declaration of identity extends to the natural world. Most countries, states and provinces have designated a species of animal or plant as "theirs", declaring it the national bird or the state flower. Given this powerful predisposition, it is not surprising that people, including ecologists, show favouritism toward native organisms.
vaata veelDawkins evolutsiooni kaitsel
Newsweek on avaldanud lõigu Richard Dawkinsi raamatust The Greatest Show on Earth: The Evidence for Evolution, milles kuulus ateist ja teadusliku mõttemaailma propageerija peab maha väikese, ent väga veenva kaitsekõne evolutsioonile. What would be evidence against evolution, and very strong evidence at that, would be the discovery of even a single fossil in the wrong geological stratum. As J.B.S. Haldane famously retorted when asked to name an observation that would disprove the theory of evolution, "Fossil rabbits in the Precambrian!" No such rabbits, no authentically anachronistic fossils of any kind, have ever been found. All the fossils that we have, and there are very very many indeed, occur, without a single authenticated exception, in the right temporal sequence. Yes, there are gaps where there are no fossils at all, and that is only to be expected. But not a single solitary fossil has ever been found before it could have evolved. That is a very telling fact. A good theory is one that is vulnerable to disproof, yet is not disproved. Evolution could so easily be disproved if just a single fossil turned up in the wrong date order. Evolution has passed this test with flying colors. Skeptics of evolution who wish to prove their case should be diligently scrabbling around in the rocks, desperately trying to find anachronistic fossils. Maybe they'll find one. Want a bet?
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