Big Bang Fears
The world's biggest physics experiment will suffer another setback in two years time when it is expected to be shut down for repairs, pushing full operating capacity back another year.
The world's biggest physics experiment will suffer another setback in two years time when it is expected to be shut down for repairs, pushing full operating capacity back another year. "Scientists in charge of the Large Hadron Collider (LHC) in Geneva announced yesterday that the machine will only be able to run on half energy before it is temporarily shut down in two years' time. Its full operating capacity designed to probe the frontiers of science will not be achieved until at least 2013 – several years later than planned. However, the European Centre for Nuclear Research (Cern), which operates the £2.6bn atom-smasher on the Franco-Swiss border, said that the additional costs of correcting the problem in the machine's copper sheaths or "stabilisers" would come out of its existing budget and it would not be asking for any additional funding from contributing countries, including Britain. On 19 September 2008, the LHC had to be shut down just days after it was switched on for the first time because of an electrical fault that led to helium gas being accidentally released into the machine's underground tunnel. The fault took £25m to fix but Cern's engineers found that further work on the copper stabilisers designed to soak up spare electrical current from the supercooled magnets was needed before the machine could go to full energy. 'I wouldn't call it a design flaw. It is just that some of the copper stabilisers are not up to the quality needed to go to the full energy level,' said Steve Myers, director of accelerators and technology at Cern."
Jonathan Zimmerman explains why teachers should invite, not censor, tough classroom debates.
- During times of war or national crisis in the U.S., school boards and officials are much more wary about allowing teachers and kids to say what they think.
- If our teachers avoid controversial questions in the classroom, kids won't get the experience they need to know how to engage with difficult questions and with criticism.
- Jonathan Zimmerman argues that controversial issues should be taught in schools as they naturally arise. Otherwise kids will learn from TV news what politics looks like – which is more often a rant than a healthy debate.
Controversial map names CEOs of 100 companies producing 71 percent of the world's greenhouse gas emissions.
- Just 100 companies produce 71 percent of the world's greenhouse gases.
- This map lists their names and locations, and their CEOs.
- The climate crisis may be too complex for these 100 people to solve, but naming and shaming them is a good start.
It marks another milestone in SpaceX's long-standing effort to make spaceflight cheaper.
- SpaceX launched Falcon Heavy into space early Tuesday morning.
- A part of its nosecone – known as a fairing – descended back to Earth using special parachutes.
- A net-outfitted boat in the Atlantic Ocean successfully caught the reusable fairing, likely saving the company millions of dollars.
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