Keyword: stringtheory
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The largest physics experiment ever built is now testing the nature of reality. String theory, supersymmetry and other theories beyond the Standard Model are under scrutiny. More than 10,000 people have been involved. Total cost is nearing $10 billion. This, of course, is the Large Hadron Collider (LHC), which helped discover the Higgs Boson. Simultaneously, the ACME experiment, run by a team of less than 50, built for a few million dollars (and much, much smaller), has created a more precise test of these advanced theoeries. This experiment hinges on an extremely painstaking and precise method to picture the shape...
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BRUSSELS, BELGIUM - The International Space Nomenclature Council today adopted the term 'emplacements de hauts gravité super' - or 'super high gravity locations' - as the official replacement name for black holes. Originally named in reference to the fact that light cannot escape their intense gravity, the term 'black hole' was increasingly criticized as being insensitive to African-Americans and African-Europeans. "We're glad the council finally took action on this issue." said Isaiah Herman, Chairman of the National African-American Coalition of People. "The unimaginable destructive power of these super high gravity locations was giving the word 'black' a negative connotation throughout...
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The bizarre behaviour of the quantum world — with objects existing in two places simultaneously and light behaving as either waves or particles — could result from interactions between many 'parallel' everyday worlds, a new theory suggests. “It is a fundamental shift from previous quantum interpretations,” says Howard Wiseman, a theoretical quantum physicist at Griffith University in Brisbane, Australia, who together with his colleagues describes the idea in Physical Review X1. Theorists have tried to explain quantum behaviour through various mathematical frameworks. One of the older interpretations envisages the classical world as stemming from the existence of many simultaneous quantum...
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A new exotic particle has been hiding out amidst the gobs of data collected by the world's largest atom smasher, physicists have discovered. The new particle, called Ds3*, is a meson — a type of unstable particle made of one quark and one antiquark. Quarks are subatomic particles and are the most basic building blocks of matter that make up protons and neutrons. They're held together by the strong interaction, or strong force, that is one of the four fundamental forces in nature. (Electromagnetism, weak interaction and gravity are the other three.) No stable form of matter would exist without...
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Hidden away in the secret depths of the Skunk Works, a Lockheed Martin research team has been working quietly on a nuclear energy concept they believe has the potential to meet, if not eventually decrease, the world’s insatiable demand for power. Dubbed the compact fusion reactor (CFR), the device is conceptually safer, cleaner and more powerful than much larger, current nuclear systems that rely on fission, the process of splitting atoms to release energy. Crucially, by being “compact,” Lockheed believes its scalable concept will also be small and practical enough for applications ranging from interplanetary spacecraft and commercial ships to...
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Lockheed Martin, the aerospace and defense conglomerate based in Bethesda, Md., is claiming to have made a major breakthrough in nuclear fusion, which could lead to development of reactors small enough to fit on the back of a truck within a decade. In the simplest terms, nuclear fission breaks a single atom into two whereas nuclear fusion combines two atoms into one. Fusion, the holy grail of nuclear power, creates three to four times as much energy as fission. More importantly, fusion’s key advantage over fission is that it does not produce cancer-causing radioactive waste. (VIDEO-AT-LINK)Tom McGuire, who heads the...
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Fusion energy almost sounds too good to be true – zero greenhouse gas emissions, no long-lived radioactive waste, a nearly unlimited fuel supply. Perhaps the biggest roadblock to adopting fusion energy is that the economics haven't penciled out. Fusion power designs aren't cheap enough to outperform systems that use fossil fuels such as coal and natural gas. University of Washington engineers hope to change that. They have designed a concept for a fusion reactor that, when scaled up to the size of a large electrical power plant, would rival costs for a new coal-fired plant with similar electrical output. The...
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New research from the University of Western Australia reveals that the amount of dark matter in the Milky Way is half as much as previously thought. Australian astronomers used a method developed almost 100 years ago to discover that the weight of dark matter in our own galaxy is 800,000,000,000 (or 8 x 1011) times the mass of the Sun. They probed the edge of the Milky Way, looking closely, for the first time, at the fringes of the galaxy about 5 million billion kilometers from Earth. Astrophysicist Dr Prajwal Kafle, from The University of Western Australia node of the...
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In 1909, Ernest Rutherford, Hans Geiger and Ernest Marsden took a piece of radium and used it to fire charged particles at a sheet of gold foil. They wanted to test the then-dominant theory that atoms were simply clusters of electrons floating in little seas of positive electrical charge (the so-called ‘plum pudding’ model). What came next, said Rutherford, was ‘the most incredible event that has ever happened to me in my life’. Despite the airy thinness of the foil, a small fraction of the particles bounced straight back at the source – a result, Rutherford noted, ‘as incredible as...
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The new Majorana particle showed up inside a superconductor, a material in which the free movement of electrons allows electricity to flow without resistance. The research team, led by Ali Yazdani of Princeton University, placed a long chain of iron atoms, which are magnetic, on top of a superconductor made of lead. Normally, magnetism disrupts superconductors, which depend on a lack of magnetic fields for their electrons to flow unimpeded. But in this case the magnetic chain turned into a special type of superconductor in which electrons next to one another in the chain coordinated their spins to simultaneously satisfy...
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Neil deGrasse Tyson faked a Bush quote and belatedly apologized for it after the resulting controversy spilled into the Washington Post. But true to Tysonism, his apology consisted of various empty profundities and self-promotion climaxing in… I will still mention Islamic Extremists flying planes into buildings in the 21st century. I will still contrast it with the Golden Age of Islam a millennium earlier. And I will still mention the President’s quote. But instead, I will be the one contrasting what actually happened in the world with what the Bible says: The Arabs named the stars, not God. Tyson is...
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Popular scientist Neil deGrasse Tyson responded publicly to an email sent by Sean Davis of The Federalist. You can read it in its entirety on Facebook. To quickly review the situation that’s been unfolding in recent weeks, Sean found significant problems in various claims that Tyson makes as part of his public presentations on science. A newspaper headline touted for years by Tyson likely doesn’t exist. The exact quote he uses to bash members of Congress as being stupid also doesn’t exist. The details within one of Tyson’s favorite anecdotes — a story of how he bravely confronted a judge...
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... Well, even 90 years isn't enough, it seems, so right now, we are entering new waters – the denial of some basic results of general relativity, our modern theory of gravity that has been around and available to everyone since 1916. So in the last week, hundreds of publications informed their readers that it's been "mathematically proven" that the big bang theory is wrong and the black holes don't exist. These nutty claims boil down to some papers by a crackpot named Ms Laura Mersini-Houghton (no, I really, really won't accept her doctorate) who had previously claimed that she...
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Inflation is dead, long live inflation! The very results hailed this year as demonstrating a consequence of inflationary models of the universe – and therefore pointing to the existence of multiverses – now seem to do the exact opposite. If the results can be trusted at all, they now suggest inflation is wrong, raising the possibility of cyclic universes that existed before the big bang. In March experimentalists announced that primordial gravitational waves had been discovered. The team behind the BICEP2 Telescope in Antarctica had observed telltale twists and turns in the polarisation of the cosmic microwave background radiation (CMB)...
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Here's one certain sign that something is very wrong with our collective mind: Everybody uses a word, but no one is clear on what the word actually means. One of those words is "science." Everybody uses it. Science says this, science says that. You must vote for me because science. You must buy this because science. You must hate the folks over there because science. Look, science is really important. And yet, who among us can easily provide a clear definition of the word "science" that matches the way people employ the term in everyday life? So let me explain...
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Spend any time in American science media and you may find some of them are pretty far out of the political mainstream; so far out, they may not even be friends with anyone who has not always voted the same way as them. So it's unsurprising that much of science media once perpetuated the claim that 'science votes Democrat.' Humans are fallible and confirmation bias is sneaky. As was apocryphally attributed to New Yorker film critic Pauline Kael after the 1972 Presidential election and a Richard M. Nixon landslide victory, "I don't know how Nixon won. No one I know...
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In some ways, the history of science is the history of a philosophical resistance to mythical explanations of reality. In the ancient world, when we asked “Where did the world come from?” we were told creation myths. In the modern world, we are instead told a convincing scientific story: Big Bang theory, first proposed in 1927 by the Belgian Roman Catholic priest Georges Lemaître. It is based on observations that galaxies appear to be flying apart from one another, suggesting that the universe is expanding. We trace this movement back in space and time to nearly the original point of...
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LONDON: Stephen Hawking has recently warned that the God particle or Higgs boson has the potential to obliterate the universe. The 72-year-old cosmologist said Higgs boson could become unstable at very high energy levels, which would lead to a "catastrophic vacuum decay" causing space and time to collapse and that there would not be any warning to the danger, the Daily Express reported. Speaking in the preface to a new book called Starmus, the Cambridge-educated scientist said that the Higgs potential has the worrisome feature that it might become mega-stable at energies above 100bn giga-electron-volts (GeV). However, Hawking did also...
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In just a matter of days, the corona — a cloud of particles traveling near the speed of light — fell in toward the black hole. The observations are a powerful test of Einstein’s theory of general relativity, which says gravity can bend space-time, the fabric that shapes our universe, and the light that travels through it. “The corona recently collapsed in toward the black hole, with the result that the black hole’s intense gravity pulled all the light down onto its surrounding disk, where material is spiraling inward,” said coauthor Michael Parker from the Institute of Astronomy ... NuSTAR...
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The Quantum Cheshire Cat: Can neutrons be located at a different place than their own spin? Jul 29, 2014 Enlarge The basic idea of the Quantum Cheshire Cat: In an interferometer, an object is separated from one if its properties -- like a cat, moving on a different path than its own grin. Credit: TU Vienna / Leon Filter The Cheshire Cat featured in Lewis Caroll's novel "Alice in Wonderland" is a remarkable creature: it disappears, leaving its grin behind. Can an object be separated from its properties? It is possible in the quantum world. In an experiment, neutrons travel...
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