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    Quote Originally Posted by deviousdave View Post
    Thinking it would be nice to do a weekly science update. For this week:

    582422_529684823719200_226872189_n.jpg
    Largest known structure
    Do they know who built the "structure"?
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    Quote Originally Posted by tenguy View Post
    Do they know who built the "structure"?
    Nature?
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    Good idea this thread...

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    Not new this week. But this TedTalks with David Gallo is a good one.

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    Great thread idea DD. My contribution.

    http://www.scientificamerican.com/ar...eather-records
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    Guess they will soon be sending us messages writing it in Quasar!
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    Nice idea for a thread and after reading some of the posts on this forum it's much needed.

    A contribution
    http://www.sciencedaily.com/releases...0117142432.htm
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    I really like the Big Bang Theory (I've done all of my larnin from television shows...like when I was a copper? The Professionals. How to work computers? The IT Crowd. Farming, Emmerdale!!). I'm now certain I am starting to recognise the phrase 'particle theory of matter' and in time am convinced I will understand what it means.

    Anyway, I watch BBT and then log in to the forum, and who do I see is posting?

    Heyesey - Sheldon
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    Aesopstails - Amy Farrah Fowler

    This just underpins an idea I'm having of writing a full-length comedy skit on the characters on the forum, although mine will have room to develop all of them
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    Quote Originally Posted by smcaaphd View Post
    I really like the Big Bang Theory (I've done all of my larnin from television shows...like when I was a copper? The Professionals. How to work computers? The IT Crowd. Farming, Emmerdale!!). I'm now certain I am starting to recognise the phrase 'particle theory of matter' and in time am convinced I will understand what it means.

    Anyway, I watch BBT and then log in to the forum, and who do I see is posting?

    Heyesey - Sheldon
    DeviousDave (nka: dl) - Leonard
    ShakeyZulu - Howard
    AZRIEL - Raj
    Lioness - Penny
    Kimiko - Bernadette
    Inthemindseye - Stuart
    Aesopstails - Amy Farrah Fowler

    This just underpins an idea I'm having of writing a full-length comedy skit on the characters on the forum, although mine will have room to develop all of them
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    Quote Originally Posted by minerva_x View Post
    Practices gynecology but has the license for cardiology.... bad..bad..bad...
    ....somebody appears to know me too well
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    Quote Originally Posted by Yaztromo View Post
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    Solar Plasma brings Impressive Light Display

    A large blob of solar plasma was ejected from the surface of the Sun on Sunday January 13th and headed directly for the Earth; fortunately the plasma was not powerful enough to cause problems and added to the spectacular Northern Lights display already underway in the northern hemisphere.


    “We’re not going to be in for a big disturbance,” said Norm Cohen, senior forecaster at the National Oceanic and Atmospheric Administration’s Space Weather Prediction Center in Colorado. “The northern tier of the United States might be able to see aurorae.”
    The “solar blob” which first began its journey to Earth on Jan 13. is also called a “coronal mass ejection” (CME).
    What Is A coronal mass ejection?

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    Quote Originally Posted by itiswhatitis View Post
    What Is A coronal mass ejection?
    You've pretty much described it in the story given.

    The corona is the Sun's atmosphere. (It got that name when people didn't know it was an atmosphere, or indeed anything about it at all except that you can see it during a total eclipse of the Sun.)

    Every so often - nobody yet knows how or why - an incomprehensibly huge explosion at, or near, the surface of the Sun throws a great shitload of stuff out into space. Scientists aren't keep on the name "great shitload of stuff thrown out into space" so they call it a "coronal mass ejection."

    If it happens to be directly aimed at the Earth, it gets here a few days later and plays Hob with the aurorae and our radio systems. It does no physical damage because it's all composed of gas.
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    Quote Originally Posted by Heyesey View Post
    You've pretty much described it in the story given.

    The corona is the Sun's atmosphere. (It got that name when people didn't know it was an atmosphere, or indeed anything about it at all except that you can see it during a total eclipse of the Sun.)

    Every so often - nobody yet knows how or why - an incomprehensibly huge explosion at, or near, the surface of the Sun throws a great shitload of stuff out into space. Scientists aren't keep on the name "great shitload of stuff thrown out into space" so they call it a "coronal mass ejection."

    If it happens to be directly aimed at the Earth, it gets here a few days later and plays Hob with the aurorae and our radio systems. It does no physical damage because it's all composed of gas.
    We have a small idea how and why CMEs occur. In very basic layman's terms it is because the sun has a magnetic field and the sun spins. But it spins faster at the equator than at the poles, this results in the magnetic lines of flux getting all twisted up, eventually leading to them being spliced up and reconnected. Magnetic energy can get converted into kinetic energy in a process known as Magnetic reconection. Which is the current best explanation for solar flares and CMEs.

    An equally interesting question, which we don't have an explanation for would be " Why is the sun's corona so many orders of magnitude hotter than the surface of the sun?"
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    Quote Originally Posted by smcaaphd View Post

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    Quote Originally Posted by minerva_x View Post
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    This week in science

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    This bong is so high tech I can't figure out exactly how it works....


    Weird science vaporizer bong?
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    Quote Originally Posted by deviousdave View Post
    An equally interesting question, which we don't have an explanation for would be " Why is the sun's corona so many orders of magnitude hotter than the surface of the sun?"
    I remember reading about this some time ago, but I had to steal this explanation from a blog. Seems logical to me.

    Why is a matches flame hotter at the top then through the middle of the flame itself....

    simple science, same applies to any heat emission source. Whether a sun or a single matchstick.
    '
    It has to do with the acceleration of particles. They can not start at their terminal speed, so as in the example of the matchstick when the naterial is excited to the point of thermal convergance, it sheds energy in the light spectrum ie the visible "flame" and escapes from the remaining solid component, some as gases vapor some as energtic kenetic particles that accelerate to lightspeed. At their terminal velocity they are the "hottest" as they are in the highest excited state for the partical, it is here that the Alpha, beta, and gamma particles seperate in the coronal layer (the sun) these particles then interact with escaping gases and near space gases near the sun causing the coronal aura which we can then pick up via IR and visible light differences.
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    Quote Originally Posted by minerva_x View Post
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    It didn't happen this week, but it's still pretty damn cool. A 15 year old developed a test that works like diabetic test paper in testing for early stage pancreatic cancer. Pancreatic cancer is extremely deadly, primarily because it's not usually discovered until it has spread to other organs. His test is incredibly cheap and non-invasive.


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    Well, finally I'm pulling up my big girl pants and going to lern me sum syence...


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    Dear Prof. Dave

    What's the story on this asteroid the size of an aircraft carrier that is going to pass us by?

    I mean it is going to pass us by...right?

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    Quote Originally Posted by thinskin View Post
    Dear Prof. Dave

    What's the story on this asteroid the size of an aircraft carrier that is going to pass us by?

    I mean it is going to pass us by...right?

    Thinskin
    Yes. But to put things into scale, imagine a beach ball, then imagine a grain of sand passing the beach ball, at a distance of more than the diameter of the beach ball away from the surface.

    Only this a giant beach ball, and microscopic grain of sand.
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    THE SUN:

    The Sun’s visible surface, or photosphere, is 10,000į Fahrenheit (5500į Celsius). As you move outward from it, you pass through a tenuous layer of hot ionized gas or plasma called the corona. The corona is familiar to anyone who has seen a total solar eclipse, since it glimmers ghostly white around the hidden Sun.

    But how can the solar atmosphere get hotter, rather than colder, the farther you go from the Sun’s surface? This mystery has puzzled solar astronomers for decades. A suborbital rocket mission that launched in July 2012 has just provided a major piece of the puzzle.

    The High-resolution Coronal Imager (Hi-C) revealed one of the mechanisms that pumps energy into the corona, heating it to temperatures up to 7 million degrees F (3.9 million degrees C). The secret is a complex process known as magnetic reconnection.

    “This is the first time we’ve had images at high enough resolution to directly observe magnetic reconnection,” said Leon Golub from the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts. “We can see details in the corona five times finer than any other instrument.”

    “Our team developed an exceptional instrument capable of revolutionary image resolution of the solar atmosphere,” said Jonathan Cirtain from the Marshall Space Flight Center in Huntsville, Alabama. “Due to the level of activity, we were able to clearly focus on an active sunspot, thereby obtaining some remarkable images.”

    Magnetic braids and loops
    The Sun’s activity, including solar flares and plasma eruptions, is powered by magnetic fields. Most people are familiar with the simple bar magnet and how you can sprinkle iron filings around one to see its field looping from one end to the other. The Sun is much more complicated.

    The Sun’s surface is like a collection of thousand-mile-long magnets scattered around after bubbling up from inside the Sun. Magnetic fields poke out of one spot and loop around to another spot. Plasma flows along those fields, outlining them with glowing threads.

    The images from Hi-C show interweaved magnetic fields that were braided just like hair. When those braids relax and straighten, they release energy. Hi-C witnessed one such event during its flight. It also detected an area where magnetic field lines crossed in an X and then straightened out as the fields reconnected. Minutes later, that spot erupted with a mini solar flare.

    Hi-C showed that the Sun is dynamic, with magnetic fields constantly warping, twisting, and colliding in bursts of energy. Added together, those energy bursts can boost the temperature of the corona to 7 million degrees F when the Sun is particularly active.

    Selecting the target
    The telescope aboard Hi-C provided a resolution of 0.2 arcsecond — about the size of a dime seen from 10 miles (16 kilometers) away. That allowed astronomers to tease out details just 100 miles (160km) in size. For comparison, the Sun is 865,000 miles (1.39 million km) in diameter.

    Hi-C photographed the Sun in ultraviolet light at a wavelength of 19.3 nanometers — 25 times shorter than wavelengths of visible light. That wavelength is blocked by Earth’s atmosphere, so to observe it astronomers had to get above the atmosphere. The rocket’s suborbital flight allowed Hi-C to collect data for just over five minutes before returning to Earth.

    Hi-C could only view a portion of the Sun, so the team had to point it carefully. And since the Sun changes hourly, they had to select their target at the last minute — the day of the launch. They chose a region that promised to be particularly active.

    “We looked at one of the largest and most complicated active regions I’ve ever seen on the Sun,” said Golub. “We hoped that we would see something really new, and we weren’t disappointed.”

    Next steps
    Golub said scientists continue to analyze data from Hi-C for more insights. Researchers are hunting areas where other energy release processes were occurring.

    In the future, the scientists hope to launch a satellite that could observe the Sun continuously at the same level of sharp detail.

    “We learned so much in just five minutes,” said Golub. “Imagine what we could learn by watching the Sun 24/7 with this telescope.”



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    Multiple Universe's

    Question: Why Are There Multiple Universes?
    I've heard that physicists believe there are multiple universes, but why? I get that it's possible they could exist, but since no one can see them, how can anyone know for sure? Do physicists have good reasons for thinking there may be multiple universes?
    Answer: The idea of multiple universes is very popular, not only in physics but also in popular culture. It's been used in a wide number of science fiction shows, and scientists continue to invoke it frequently as part of explaining physics to popular audiences. This question actually breaks
    Do Physicists Believe in Multiple Universes?
    Many physicists do believe that there are multiple universes, in some form or another. However, it's not particularly clear to me that you could necessarily say this is a majority viewpoint. Most physicists really don't deal with this question at all and, because there's no direct evidence one way or another. Many seem to consider it a distraction which interferes with time that could be spent focusing on more important ideas in physics.
    However, if you get most of your physics knowledge from television shows - such as PBS' NOVA, The History Channel's The Universe, or pretty much anything on The Science Channel - then you can be forgiven for thinking that this is something that physicists spend a lot of their time focusing on. It makes for great television, that's for sure, and it's fun to write articles on.
    Still, the physicists who do believe in multiple universes do so because invoking the idea of multiple universes takes care of some problems in the realms of particle physics and cosmology.
    What Is the Reason for Believing in Multiple Universes?
    The argument in favour of multiple universes tends to go something like this:
    First, there's a strong understanding in cosmology of something called the fine-tuning problem, which is basically the idea that as we understand the way our universe is constructed, the more precarious our existence in it is. As physicists have examined the way the universe has changed over time since the big bang, they have come to believe that the early conditions of the universe, had they just been a microscopic bit different, would have caused a universe that is inhospitable to life.
    In fact, if a universe spontaneously came into existence, physicists would expect it to spontaneously collapse or possibly to expand so rapidly that particles never really interact with each other. British physicist Martin Reese wrote extensively about this idea in his classic book Just Six Numbers: The Deep Forces That Shape the Universe.
    With an understanding of these "finely-tuned"
    With an understanding of these "finely-tuned" properties in the universe, some argue for the need of a creator (i.e. God). Since physicists seek to explain properties of the universe without reference to a supernatural agency, they would like to understand the properties of the universe without invoking a deity of any kind. (We'll come back to God in a bit.)
    The easiest solution would just be to say, "Well, that's how it is," but the problem with that is that it's not really an explanation. It represents a remarkable lucky break that a single universe would come into being and that universe would just happen to have the very precise properties needed to develop life ... or, for that matter, to develop anything. (Remember: most physical properties would result in a universe which collapses into nothingness instantly or expands into a vast sea of nothingness, so this isn't just a matter of trying to explain human beings as we happen to exist, but of explaining the very existence of any sort of universe.)
    The alternative that many cosmologists adopt is that there are actually a vast number of universes, which can have different properties. Within that vast multiverse of universes, some subset of them (including our own) would contain properties that allow them to exist for relatively long periods of time, some subset of those (again, including our own universe) would have the properties that allow them to form complex chemicals and, ultimately, life.
    String Theory and Multiple Universes
    String theory has recently begun to support this idea, because the results make it clear that there are a vast number of possible solutions to string theory - in other words, if string theory is correct then there are still many different ways to construct the universe.
    In addition, since string theory presents the idea of extra dimensions, it also includes a structure to think about where these other universes could be located. Our universe, which includes 4 dimensions of spacetime, seems to exist in a universe that may contain as many as 11 total dimensions (often called the bulk by string theorists). There's no reason to think that the bulk couldn't contain other universes in addition to our own. (The bulk, presumably, has always existed.)
    The God Hypothesis and Multiple Universes
    Most physicists believe in multiple dimensions because they don't want to invoke a creator of any kind, which is as it should be because that would be bad physics. (Even physicists who believe in God typically do not invoke God as a causative agent in their theories.) However, what if there is some sort of a god or creator? Would there still be multiple universes? My answer to this question is "Yes," and here's why:
    If there were a creator of our universe, then it is presumed to exist outside of our universe in some fashion. Since the creator exists outside of our universe, this means there must be something outside the universe where the creator exists ... in other words, there has to be at least one other universe. (In addition, there's nothing to say that the creator couldn't create other universes anyway, so there could still be other universes in the more conventional sense.) So, even with a creator, there's still a strong indication there are multiple universes.

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    TWIS: fuck all happened apart from Dyson making an announcement about an expensive hand drier.

    Quote Originally Posted by minerva_x View Post
    Practices gynecology but has the license for cardiology.... bad..bad..bad...
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    Saftey Concerns;

    The U.S. Food and Drug Administration (FDA) recently issued issued a consumer warning for Super Power, a supplement for male sexual enhancement.
    Manufactured by Freedom Trading, laboratory tests showed the supplements contained sildenafil. Sildenafil is a main ingredient in erectile dysfunction drugs. Thus, Super Power is considered an unapproved drug. An interaction between sildenafil and prescription drugs containing nitrates (such as nitroglycerin) may lower blood pressure to an unsafe level. Individuals taking nitrates often have diabetes, high blood pressure or cholesterol, or heart disease.
    Freedom Trading has recalled one lot of Super Power.
    Any consumer in possession of lot number L08108 of Super Power should discard the product immediately. Individuals taking Super Power should report any negative side effects to their healthcare provider and the FDA's MedWatch Safety Information and Adverse Event Reporting Program.
    Below is a link to ingredients and safety information for Super Power:
    Super Power

    Additional list of herbs and supplements that may lower blood pressure: Hypotensive Herbs and Supplements

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