Saturday 26 May 2012

evolutiob


Earliest music instruments found


Mammoth ivory fluteThe flutes, made from bird bone and mammoth ivory, come from a cave in southern Germany which contains early evidence for the occupation of Europe by modern humans -Homo sapiens.
Scientists used carbon dating to show that the flutes were between 42,000 and 43,000 years old.
A team led by Prof Tom Higham at Oxford University dated animal bones in the same ground layers as the flutes at Geissenkloesterle Cave in Germany's Swabian Jura.
Prof Nick Conard, the Tuebingen University researcher who identified the previous record-holder for oldest instrument in 2009, was excavator at the site.
He said: "These results are consistent with a hypothesis we made several years ago that the Danube River was a key corridor for the movement of humans and technological innovations into central Europe between 40,000-45,000 years ago.
"Geissenkloesterle is one of several caves in the region that has produced important examples of personal ornaments, figurative art, mythical imagery and musical instruments."
Musical instruments may have been used in recreation or for religious ritual, experts say.
And some researchers have argued that music may have been one of a suite of behaviours displayed by our species which helped give them an edge over the Neanderthals - who went extinct in most parts of Europe 30,000 years ago.
Music could have played a role in the maintenance of larger social networks, which may have helped our species expand their territory at the expense of the more conservative Neanderthals.
The researchers say the dating evidence from Geissenkloesterle suggests that modern humans entered the Upper Danube region before an extremely cold climatic phase at around 39,000-40,000 years ago.
Previously, researchers had argued that modern humans initially migrated up the Danube immediately after this event.
"Modern humans during [this] period were in central Europe at least 2,000-3,000 years before this climatic deterioration, when huge icebergs calved from ice sheets in the northern Atlantic and temperatures plummeted," said Prof Higham.
"The question is what effect this downturn might have had on the people in Europe at the time."

Friday 18 May 2012


Can you build a human body?


    Drag and drop parts to find out more
    • Brain
    • Pancreas
    • Ear
    • Heart
    • Eye
    • Skin
    • Leg
    • Arm

    Production: James Gallagher, Tom Beal, Anna-Marie Lever. Design: Mark Bryson. Development: Luke Ward.
    The Bionic Bodies series on the BBC News website will be looking at how bionics can transform people's lives. We will meet a woman deciding whether to have her hand cut off for a bionic replacement and analyse the potential to take the technology even further, enhancing the body to superhuman levels. The series continues on Wednesday with a look at some of the earliest prosthetics from ancient Egypt.

    Technology has always strived to match the incredible sophistication of the human body. Now electronics and hi-tech materials are replacing whole limbs and organs in a merger of machine and man.
    Later this year a team of researchers will try out the first bionic eye implant in the UK hoping to help a blind patient see for the first time. It is one of the extraordinary medical breakthroughs in the field, which are extending life by years and providing near-natural movement for those who have lost limbs.
    Over the coming weeks, BBC News will explore the field of bionics in a series of features. We start with a selection of the latest scientific developments.

    Wednesday 9 May 2012

    Climate ship


    Climate ship plots course through the battering waves

    Solar-powered boat The 2015 climate deal seems a far horizon, and the Brussels meeting aims to revive momentum
    • Rio: Money flows and commitment woes
    • Food: Organic growth?
    • Inside Mexico's climate revolution
    • Is shale gas the GM of energy?
    The European Union hosts this week what could be one of the most significant meetings of the year on climate change.
    Last December's UN climate summit, in the South African port of Durban, saw heated discussions on a proposal that governments should commit to agreeing a new comprehensive global emissions-limiting deal with some kind of legal force before 2015.
    Reluctant nations found themselves up against a burgeoning coalition of principally small countries from the developed and developing worlds alike, which found common interest in tackling climate change as quickly as possible.
    The rainbow coalition included the EU, the Least Developed Countries (LDCs), small islands vulnerable to impacts such as rising sea levels, and progressive Latin American countries such as Costa Rica.
    The giant container ships steaming into and out of the Durban docks were matched stylistically by the delegations striding from conference room to conference room, their beetle brows and purposeful gaits testament to the precious cargo they might deliver.
    And deliver they did, eventually, with governments committing to agree a new global deal by 2015 and have it in force by 2020, with every country included.
    Plane and vapour trail Arguments over aviation emissions are clouding the climate change skies
    But it was just a promise; and promises have been broken before on the wheels of realpolitik.
    Since Durban, real world issues have begun to bear down on those leading the charge towards that new global deal.
    Recession continues to stalk the eurozone. And even though many European governments say green measures will not impoverish them further and may even make them richer, few are acting as though they believe it.
    Opposition to the inclusion of international aviation within the EU Emission Trading Scheme (ETS) from countries such as China, the US and Russia has increased. As a result some European governments and senior EU officials fear a trade war could be triggered with nations that include eurozone creditors.
    Meanwhile, environment ministers and officials from the smaller developing countries are increasingly engaged not with the UN climate process, but with preparations for June's Rio+20 summit.
    And here they are finding that on issues such as overseas aid contributions, Europe is not always behaving as the friend it appeared to be in Durban.
    That issue carries over into the climate change discussions, because here too the rich world has promised money - $100bn per year by 2020 - and if pledges are not being met in the arena of overseas aid, why should those developing countries believe pledges will be met in the climate context?
    Just five months on, the Durban coalition is a little battered.
    On Monday and Tuesday in Brussels, at least 30 of the coalition's key members will meet to re-state their Durban commitment and talk about some of the key steps they can take in the short term to give the 2015 process some momentum.
    Water level gauge in Australia The next IPCC report is likely to make stronger forecasts on sea level rise than its predecessor
    That's an urgent priority, as the first meeting of the working group on the new process (the Durban Platform) is just a couple of weeks away and the visions of various countries on how it should progress are very different.
    They'll be talking about what needs to be done to ensure that an adequate proposal goes on the table at the next UN climate summit, in Qatar in December, for putting EU emission cuts (and possibly others too) under the Kyoto Protocol.
    They'll need to discuss how the 2015 deal can bring all countries into a new agreement that will eventually regulate emissions from all countries, yet contains the principle of equity at its heart, allowing poor countries room to emit carbon as they develop.
    They'll be trying to navigate the remaining hurdles to fully implementing new international schemes to bring financial support and clean technology from developed countries to their poorer counterparts.
    And they'll discuss Rio+20 as well - not least because some of the proposals on the table there, such as a goal to double the global share of renewable energy by 2030 and moves to make agriculture more sustainable, would by themselves slow the rise of the world's greenhouse gas emissions.
    Along the way, they'll be hoping to pick up a few countries such as Australia that didn't make it clear in Durban whether they belonged to the group pushing for the new deal or the one being pulled towards it reluctantly.
    Ministers and officials will be coming to Brussels fresh from an informal two-day session at UN climate convention headquarters in Bonn, where they've heard United Nations Environment Programme chief scientist Joseph Alcamo outline a few key issues.
    He told delegates that steps such as setting tighter rules on car emissions, regulating for energy efficient goods and building urban mass transit systems are already having an impact that can be measured.
    Martin Lidegaard and Connie Hedegaard Martin Lidegaard and Connie Hedegaard speak the same European language of climate ambition
    But he also said that without much faster uptake of such measures, the best estimate for the year 2100 would be a world that is on average 2.5-5C warmer than in pre-industrial times.
    Governments have heard such messages plenty of times before, of course.
    And they're likely to hear them louder than ever next year when the Intergovernmental Panel on Climate Change (IPCC) publishes the first instalment of its fifth Assessment Report, which is likely to forecast harsher impacts ahead on factors such as sea level rise than the previous edition.
    The geopolitics are not auspicious for a massive, game-changing leap on climate change this year.
    China is preparing for a change of leadership later this year, with President Hu Jintao and other senior figures set to step down. Presidential elections in the US and in France could usher in a major change of direction.
    So the priority is to get things right on the deliverables. And the current Danish EU presidency offers a window to do that, with its energetic Climate Minister Martin Lidegaard working alongside his predecessor Connie Hedegaard, now EU Climate Commissioner, in a co-ordinated push.
    South Africa's International Relations Minister Maite Nkoana-Mashabane, who chaired the Durban talks, said recently it was vital that "the gains made in Durban are not rolled back by being overwhelmed by the enormity of the problem and the task at hand".
    Hence the importance of the Brussels meeting, small and select though it is, as an opportunity to re-focus and re-energise - to get the small things right, and establish a framework for the bigger political negotiations that lie ahead

    Sunday 6 May 2012

    wheelchair basketball.


    Army wheelchair basketball team takes Warrior Games gold again Sgt. Jerry Griffis Brig. Gen. Darryl A. Williams, Commander of Warrior Transition Command, awards Army Veteran and San Antonio, Texas, native, Juan Soto, and his wheelchair basketball teammates gold medals during the 2012 Warrior Games, May 4, at The United States Air Force Academy, Colorado Springs, Colo. The Army defeated the Marines 54-34. The Warrior Games is a collaboration of wounded, injured, and ill service members from the Army, Navy, Marines, Air Force, and SOCOM competing in various sporting events.
    COLORADO SPRINGS, Colo. – The crowd cheered and chanted as the players entered the arena for another exciting night of wheelchair basketball. The Army faced off against the Marines once again during the 2012 Warrior Games May 4, at the United States Air Force Academy. The stake – the coveted gold medal for Warrior Games wheelchair basketball.

    Warrior Games is an annual competition of wounded, ill and injured service members from the Army, Marines, Navy, Air Force, and Special Operations Command. The games feature a variety of sporting events, including cycling, shooting, wheelchair basketball, archery, track and field, swimming, and sitting volleyball.

    The Marines were ready for revenge after an initial defeat to the Army, 45-27.

    The Army won the gold in the 2011 Warrior Games and claimed the gold again this year with a final score 54-34.

    “We had a lot of expectations put on us by winning last year,” said Army Veteran Juan Soto, of San Antonio, Texas. Soto scored the first two points of the game and was the highest scorer with 15 points.
    By halftime, the scoreboard read Army-31, Marines-21. It looked as if the margin was narrowing, but as the game progressed the Army led by 20 points until the end.

    “It feels surreal right now, like an out of body experience,” said Army Veteran and Wilmington, Del. native, Perry Price III. “All the hard work and practices paid off. I’m very happy with my team. All the hard work those guys put in together--they fought hard through injuries and everything. It’s just a wonderful feeling right now.”

    At the close of the medal ceremony, Army Sgt. Delvin Maston, Fort Sam Houston Warrior Transition Unit, gathered the Army, Marines, and Air Force teams together and delivered inspiring words. The Birmingham, Ala. native said it was important for the teams to put out a good product for all to see and all of the wheelchair basketball teams were essentially ambassadors of the sport.

    “It’s really important for us to go back home and tell as many people as we know and try to grow the sport,” said Soto.

    “I am very appreciative for this opportunity,” said Price. “Through all the support and all the help that was given to us, it was really fulfilling, and that is what the Army is all about”.



    Read more: http://www.dvidshub.net/news/87963/army-wheelchair-basketball-team-takes-warrior-games-gold-again#ixzz1u5azijve