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Space Time Travel – Relativity Visualized

Space Time Travel – Relativity Visualized
The theory of relativity holds a certain fascination for many people. At the same time it is often regarded as very abstract and difficult to understand. Part of the difficulties in understanding relativity are due to the fact that relativistic effects contradict everyday experience. Motion, for example, is a familiar process and everybody "knows from experience" that it entails neither time dilation nor length contraction. A flight with half the speed of light could correct this misjudgement but is not on offer. A possible alternative are simulations.

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Mysterious Building British archaeologists have unearthed the remains of a mysterious prehistoric structure that might be older than Egypt’s pyramids. Discovered during work at a housing development in Monmouth, Wales, the bulky feature consists of a series of trenches possibly housing the timber foundations of a massive building. NEWS: Swedish Stonehenge? Stone Structure Spurs Debate "We have what appear to be huge parallel sleeper beams set close to the edge of an ancient, dried up lake," archaeologist Steve Clarke of Monmouth Archaeology told Discovery News.

Here Come The Nanobots A team of New York University researchers has taken a major step in building a more robust, controllable machine from DNA, the genetic material of all living organisms. Constructed from synthetic DNA molecules, the device improves upon previously developed nano-scale DNA devices because it allows for better-controlled movement within larger DNA constructs. The researchers say that the new device may help build the foundation for the development of sophisticated machines at a molecular scale, ultimately evolving to the development of nano-robots that might some day build new molecules, computer circuits or fight infectious diseases.

Not enough hours in the day? Scientists predict time will stop completely The theory of time running out was devised by researchers from two Spanish universities trying to explain why the universe appeared to be spreading continuously and accelerating. Observations of supernovae, or exploding stars, found the movement of light indicated they were moving faster than those nearer to the centre of the universe. But the scientists claimed the accepted theory of an opposite force to gravity, known as dark energy, was wrong, and said the reality was that the growth of the universe was slowing. Professor Jose Senovilla, Marc Mars and Raul Vera from the University of the Basque Country and the University of Salamanca said the deceleration of time was so gradual, it was imperceptible to humans. Their proposal, published in the journal Physical Review D, claimed dark energy does not exist and that time was winding down to the point when it would finally grind to a halt long after the planet ceased to exist.

The Vega Science Trust - Richard Feynman - Science Videos Chosen by the New Scientist - best on-line videos 2007. A set of four priceless archival science video recordings from the University of Auckland (New Zealand) of the outstanding Nobel prize-winning physicist Richard Feynman - arguably the greatest science lecturer ever. Although the recording is of modest technical quality the exceptional personal style and unique delivery shine through. Feynman gives us not just a lesson in basic physics but also a deep insight into the scientific mind of a 20th century genius analyzing the approach of the 17th century genius Newton. For the young scientist, brought up in this age of hi-tech PC/Power Point-based presentations, we also get an object lesson in how to give a lecture with nothing other than a piece of chalk and a blackboard. Furthermore we are shown how to respond with wit and panache to the technical mishaps that are part-and-parcel of the lecturer`s life.

"Emergency" Gold Treasures Found in Holy Land Photograph by Dan Balilty, AP Though separated by a thousand years, two newfound "emergency hoards" from Israel—including gold jewelry and coins—may have been hidden by ancient families fleeing unknown dangers, archaeologists say. Revealed late last month, these 3,000-year-old rings (foreground) and earrings, from the older hoard, were found in a ceramic jug among the ruins of a house. Though unearthed in 2010, the vessel concealed its cargo until late last year, when scientists began molecular analysis of the contents.

Problem of Reciprocity Back to main course page John D. Norton Department of History and Philosophy of Science University of Pittsburgh Background reading: J. Schwartz and M. Faster then light travel to be rechecked in May 2012 UPDATE 8 June 2012 Neutrinos sent from CERN to Gran Sasso respect the cosmic speed limit At the 25th International Conference on Neutrino Physics and Astrophysics in Kyoto today, CERN Research Director Sergio Bertolucci presented results on the time of flight of neutrinos from CERN to the INFN Gran Sasso Laboratory on behalf of four experiments situated at Gran Sasso. The four, Borexino, ICARUS, LVD and OPERA all measure a neutrino time of flight consistent with the speed of light. This is at odds with a measurement that the OPERA collaboration put up for scrutiny last September, indicating that the original OPERA measurement can be attributed to a faulty element of the experiment’s fibre optic timing system.

Relativistic Baseball What would happen if you tried to hit a baseball pitched at 90% the speed of light? - Ellen McManis Let’s set aside the question of how we got the baseball moving that fast. We'll suppose it's a normal pitch, except in the instant the pitcher releases the ball, it magically accelerates to 0.9c. Quantum World Cookies on the New Scientist website close Our website uses cookies, which are small text files that are widely used in order to make websites work more effectively. "Incredible" hoard of 50,000 Iron Age coins, buried in escape from Caesar, found in Jersey A solid mass representing one of the largest Iron Age coin hoards ever found has been discovered in farming fields in Jersey© Jersey Heritage An “incredible” hoard of Celtic coins, weighing almost a ton and believed to have been rushed across the sea in a bid to escape the clutches of Caesar’s armies during the Late Iron Age, has been discovered by two amateur metal detectorists in a Jersey field. The solid mass, thought to contain up to 50,000 coins, was hidden by the Coriosolitae tribe of the modern-day St Malo and Dinan region. It originates from the year 50BC, when the Roman ruler’s forces drove tribes towards the French coast as they advanced, and would have been buried after arriving from the Armorican area – now known as Brittany and Normandy.

Physics Flash Animations We have been increasingly using Flash animations for illustrating Physics content. This page provides access to those animations which may be of general interest. The animations will appear in a separate window.

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