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Top Sci-Fi Time-Travel Methods


Discovery.com has rounded up some of Hollywood's most ridiculous explanations for time travel, including Superman reversing the earth and the quantum mechanics and "exotic material" underlying [SPOILER ALERT] the time-hopping island in 'Lost.'

The time-traveling trope has been a stalwart in science fiction since the 18th century, and continues to be a defining characteristic of the genre. Discovery touches on the good ones, including lesser known (and more realistic) moments like the wormholes in 'Donnie Darko' and the new 'Star Trek.' However, it shoots most theories down, arguing that black holes, for instance, would compress matter into one singularity and that wormholes are still too theoretically unruly to adequately discuss.

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Nerd Tattoos Physics Equation -- Onto His Back



For those interested in getting their asses kicked by one or perhaps even many dumb jocks, here's a three-part tattoo you might consider getting: the Born Oppenheimer Approximation, its equivalent in the form of a 3-D Schrödinger Equation, and the solution to the equation itself in the form of a Schrödinger Equation. It's here modeled by a dude named Joe, who recently had the trifecta of nerditude tattooed across his back.

Writing in to Discover's Science Tattoos Blog, Joe had this to say: "As a biochemist and molecular biophysicist I studied a lot of this stuff and I must say, Schrödinger was my favorite and well, I had to do it." An artist named Lisa at Tucson, Arizona's Red Sky Studios sketched all those sigmas into Joe's back, and we're guessing she knows a lot more about Schrödinger than she did a few weeks ago. [From: Discover, via Gizmodo]

Visionaries

World's Smallest Light Bulb

Scientists at UCLA have constructed the world's smallest light bulb. When it's turned off, the tiny filament is invisible to the naked eye. Flip the switch, however, and it becomes a tiny pin-prick of light.

The minuscule bulb was created using carbon nanotube technology, a much touted scientific breakthrough that has, until now, been used to do little else other than create portraits of our dear leader. The carbon filament that creates the light is only 100 atoms wide -- tens of thousands of times smaller than the filament used by Edison in his first light bulb.

What practical purpose does such an itty-bitty light serve? Well, none, but research from the project could prove invaluable. The carbon nanotube that is large enough that the traditional laws of thermodynamics apply, but small enough to be considered "molecular," the scale at which the laws of quantum mechanics come into play.

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Audio/Video

Action Movies Teach Kids Bad Physics

Crouching Tiger, Hidden Dragon
Sure it's cool in big summer blockbusters when the hero drives the car and jumps 14 others, or shoots one bullet through three guys, but the truth is moves such as those are physically impossible. You may be sitting there saying to yourself "yeah... I know, it's just a movie," but apparently, some kids are are getting some bad education from these movies with completely fantastic physics.

Two professors at the University of Central Florida have written an article published in the German physics journal "Praxis der Naturwissenschaften Physik." Costas J. Efthimiou, one of the authors of the article, complains that some people actually think a bus traveling at 70 miles-per-hour could jump a 50 foot gap, just like in 'Speed.' Older students may know that movies are not real, but apparently kids have a tendency to believe what they see on the screen.

Is it so surprising? Maybe not. Science scores are down across the country in most grade levels, according to the Science and Engineering Indicators 2006 report, and even worse, only a third of students were considered proficient in the sciences at their grade level.

Efthimiou has begun teaching a course called Physics in Film to try and engage his students at UCF, but as the title of his article says, "Hollywood Blockbusters: Unlimited Fun but Limited Science Literary."

From Slashdot and Physorg.com

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