TOP 100 SCIENCE SITES
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| Greens air concerns on Fremantle Port dredging The WA Greens say they have serious concerns about the impact the proposed dredging at Fremantle harbour will have on the Swan River's dolphin population. abc.net.au |
Richard Branson joins the space race For $200,000, you too could soon be blasting out of the Earth's atmosphere thanks to Richard Branson. But is this really a revolution in space travel?The Mojave desert, 160km north of Los Angeles, is best known for its unforgiving weather and ancient, almost alien, landscape. On Monday, however, it will play host to a very modern spectacle when Sir Richard Branson unveils the latest stage of his scheme to transform space travel into a cheap, commercial proposition.On a barren airstrip tucked into the edge of the desert, the 59-year-old billionaire will pull back the curtain on Virgin Galactic's SpaceShipTwo (SS2) – the carbon-composite craft about the size of a Gulfstream jet (and a third of the size of the Space Shuttle) which aims to carry paying passengers out of the Earth's atmosphere to the brink of space.Already, 300 wealthy adventurers are said to have signed up for the proposed $200,000, two-and-a-half-hour flights – among them scientists Stephen Hawking and 90-year-old James Lovelock, and celebrities such as X-Men director Brian Singer and former Dallas star Victoria Principal. In stark contrast to the complexity of an astronaut's training, a flight with Virgin Galactic will only require three days' pre-training. It is rumoured that the very first passengers will be Branson himself, along with his two children and parents.In all, SS2's 12ft long pressurised cabin is designed to carry six "space tourists" and two pilots beyond the Kármán line (the generally acknowledged boundary of space, 100km up). For a few minutes, they will experience weightlessness while gazing out of aeroplane-style windows at the curvature of the Earth, the thin surface of the atmosphere and, perhaps, other planets. By then the rocket's engines will have been switched off, so the ensuing silence will add to the power of the experience (trial reports from the prototype SpaceShipOne even described hearing the "ping ping" of molecules striking the bottom of the craft as it re-entered the atmosphere).The engineering acumen behind this hugely ambitious project is led by 66-year-old Burt Rutan, an aerospace maverick who has broken records and barriers throughout his career. Under Rutan's direction, SS2 has been in development for nearly five years, alongside the construction of WhiteKnightTwo – the 140ft wingspan "mothership" that will ferry the smaller rocket ship 50,000ft into the sky before it detaches, then blasts up to the edge of space at up to 2,600mph.The construction of both craft out of carbon composite materials – making them much lighter and more fuel efficient – is crucial to the success of cheap commercial space flight. WhiteKnightTwo is the largest all-composite aircraft ever built, and the weight reduction is reckoned by Virgin Galactic to improve fuel consumption by up to 60% – something that has obvious implications for the aircraft industry in the longer term.Rutan's team have also designed SS2 to curl up or "feather" its wings once out of the atmosphere, meaning it can fall back like a shuttlecock at a near-vertical angle without the need for pilot control, before reforming its wings at 60,000ft for the final gliding descent to the "spaceport's" runway.While each Space Shuttle mission is estimated to cost around $1bn, a Virgin Galactic flight (obviously much shorter, and far less complex) is put at less than $2m. But it is still a huge financial undertaking, and even with those 300 or so advanced bookings (flights are eventually anticipated to run once or even twice a day), Branson has sold part of the business to investors based in Abu Dhabi to bring in $280m of much-needed capital. He is surely also right when he says that "$200,000 is still too expensive for the majority of people".The biggest challenge came in 2007, however, when an explosion at the company's factory killed three engineers and left three others seriously injured. With typical understatement, a distraught Rutan called the blast, which happened when a rocket test stand exploded during a fairly routine trial, "a tough thing". Development was put on hold for a year.Even now, many observers remain unsure that the project can be entirely safe, and, to his credit, Rutan does not mince words on the subject, suggesting it should be compared to the early days of traditional aviation. "This is designed to be at least as safe as the early airliners in the 1920s," he has said. "But don't believe anyone who tells you that the safety will be the same as a modern airliner, which has been around for 70 years."For Branson and Virgin, though, who also have new Formula One racing and submarine exploration projects under way, breaking boundaries and taking calculated risks are all part of the brand.SpaceSpace technologyBobbie Johnsonguardian.co.uk © Guardian News & Media Limited 2009 | Use of this content is subject to our Terms & Conditions | More Feeds guardian.co.uk |
Forensic market Is a free market in forensic science dangerous? news.bbc.co.uk |
Magma building up in Philippines' Mayon volcano LEGAZPI, Philippines (AP) -- Fewer earthquakes have been recorded in the Philippines' lava-spilling Mayon volcano, but magma continues to build up inside and any lull in activity could be followed by a bigger eruption, scientists said Saturday.... hosted.ap.org |
Evolution's greatest hits, and ancient Muslim science What are evolution's 10 greatest inventions? The eye? Opposable thumbs? Our special guest Nick Lane is on hand to give us the lowdown on everything from sex to photosynthesis, why we have hot blood and the emergence of consciousness.Nick is a biochemist at University College London and has written extensively on subjects such as mitochondria and oxygen. His latest book, Life Ascending: The Ten Great Inventions of Evolution, is a handy guide to the most important evolutionary breakthroughs.Presenter Alok Jha is joined in the studio by the Observer's science editor, Robin McKie, and the Guardian's science correspondent, Ian Sample.In this week's newsjam of the week's major science stories, there are claims that fish oil may be the elixir of youth; we learn that a common household chemical found in everything from sofas and carpets to pots and pans has been linked to an increased risk of thyroid disease; the pharmaceutical company GlaxoSmithKline has said it will publish online the details of thousands of potential drugs that might cure malaria; and most men in Britain are descended from the first farmers to migrate across Europe from the Near East 10,000 years ago.Finally, Pascal Wyse takes us on a tour of an exhibition of ancient artefacts from the Islamic world that have shaped science. 1001 Inventions at the Science Museum in London gives a taste of "the forgotten story of a thousand years of science from the Muslim world".Feel free to post your comments below.Join our Facebook group. Listen back through our archive.Follow the podcast on our Science Weekly Twitter feed and receive updates on all breaking science news stories from Guardian Science.Subscribe free via iTunes to ensure every episode gets delivered. (Here is the non-iTunes URL feed).Alok JhaIan SampleRobin McKiePascal Wyse guardian.co.uk |