Exercise 'not key to obesity fight' - BBC News Physical activity has little role in tackling obesity - and instead public health messages should squarely focus on unhealthy eating, doctors say. In an editorial in the British Journal of Sports Medicine, three international experts said it was time to "bust the myth" about exercise. They said while activity was a key part of staving off diseases such as diabetes, heart disease and dementia, its impact on obesity was minimal. Instead excess sugar and carbohydrates were key. The experts, including London cardiologist Dr Aseem Malhotra, blamed the food industry for encouraging the belief that exercise could counteract the impact of unhealthy eating. They even likened their tactics as "chillingly similar" to those of Big Tobacco on smoking and said celebrity endorsements of sugary drinks and the association of junk food and sport must end.
Physicists Achieve Quantum Teleportation of Photon Over 25 Kilometers For the first time, a team of physicists have successfully teleported a quantum state of a photon to a crystal over 25 kilometers away through a fiber optic cable. This effectively showed that the photon’s quantum state, not its composition, is important to the teleportation process. The team was led by Nicolas Gisin of the University of Geneva and the results were published in the journal Nature Photonics. With this new paper, Gisin’s team has successfully squashed the previous record they set a decade ago by teleporting a quantum state of a proton 6 kilometers. The quantum state of the photon is able to preserve information under extreme conditions, including the difference between traveling as light or becoming stored in the crystal like matter.
Bohr and beyond: a century of quantum physics › Opinion (ABC Science) In Depth › Analysis and Opinion Our understanding of the quantum world began with Niels Bohr's discovery of the quantum atom in 1913. Bohr would be astounded by where his theory has since led, says Professor David Jamieson. Bohr's discovery of the quantum nature of the atom, published when he was a young man of 28, was an important pioneering contribution to the earliest days of quantum physics. Is Earth Surrounded by Dark Matter? Dark mater: The stuff that possesses mass, yet refuses to interact with radiation, so we can't 'see' it. Its nature has eluded scientists for decades, but there could be a reservoir of the stuff sitting right on our doorstep — if the weird measurements made by Global Positioning System (GPS) satellites are proven to be caused by a halo of the so-called non-baryonic matter around our planet. PHOTOS: Hubble’s Latest Mind Blowing Cosmic Pictures During a presentation at the American Geophysical Union (AGU) conference in San Francisco in December, GPS expert Ben Harris (of the University of Texas at Arlington) described some tricky measurements of the Earth’s mass using the armada of GPS satellites that are in orbit around our planet. He noticed a mass discrepancy when compared with “official” mass measurements as quoted by the International Astronomical Union (IAU).
Higgs boson: Call to rename particle to acknowledge other scientists 22 April 2013Last updated at 13:00 ET By Pallab Ghosh Science correspondent, BBC News "Fathers" of the Higgs, L-R: Francois Englert, Peter Higgs, Carl Hagen and Gerald Guralnik One of the scientists who helped develop the theory of the Higgs boson says the particle should be renamed. 20 Teen and Tween Conversation Starters How was your day? Fine. How was school? Good. Teaching with TLC: 10 ways to make physical science FUN! This month we've been completing lots of physical science lessons that my kids do not want to put down. I just love it when they are hooked on learning! My kids have been learning all about simple machines, matter, and electricity from the best science teachers at the Edison Home. What better place to learn about science than Edison's home! A big thank you to the wild wizards there!
Fluid Experiments Support Deterministic “Pilot-Wave” Quantum Theory For nearly a century, “reality” has been a murky concept. The laws of quantum physics seem to suggest that particles spend much of their time in a ghostly state, lacking even basic properties such as a definite location and instead existing everywhere and nowhere at once. Only when a particle is measured does it suddenly materialize, appearing to pick its position as if by a roll of the dice. This idea that nature is inherently probabilistic — that particles have no hard properties, only likelihoods, until they are observed — is directly implied by the standard equations of quantum mechanics. But now a set of surprising experiments with fluids has revived old skepticism about that worldview. What It’s Like to Live in a Universe of Ten Dimensions by Maria Popova What songwriting has to do with string theory. What would happen if you crossed the physics of time with the science of something and nothing? You might get closer to understanding the multiverse. In Imagining the Tenth Dimension: A New Way of Thinking About Time and Space, Rob Bryanton — a self-described “non-scientist with an inquisitive mind,” whose dayjob as a sound designer involves composing music for TV series and films — proposes a theory of the universe based on ten dimensions, a bold and progressive lens on string theory based on the idea that countless tiny “superstrings” are vibrating in a tenth dimension.
Uncertainty reigns over Heisenberg's measurement analogy A row has broken out among physicists over an analogy used by Werner Heisenberg in 1927 to make sense of his famous uncertainty principle. The analogy was largely forgotten as quantum theory became more sophisticated but has enjoyed a revival over the past decade. While several recent experiments suggest that the analogy is flawed, a team of physicists in the UK, Finland and Germany is now arguing that these experiments are not faithful to Heisenberg's original formulation. Five ways to survive your daily commute Commuting sucks. It costs up to 14% of your annual salary, increases stress levels and generally saps all energy and goodwill towards humanity. It forces you to witness your fellow wage slaves day in, day out; listen to their music, read their text messages, smell their armpits. Now, according to a recent study, it has been calculated that the daily commute uses up more than 18 months of your life, with an average of 13,870 hours spent getting to and from work – to the place that pays you the money you need in order to get there. Beckettian, or what?
Inspire Her Mind Science There’s a young 4-year old girl shuffling through a chest full of various dress-up clothes. The copy asks: Does dress-up determine her future?