Source: http://www.bbc.co.uk/nature/15835017 (video extracted with StreamTransport) As brine from the sea ice sinks, a 'brinicle' forms threatening life on the sea floor with a frosty fate. A bizarre underwater "icicle of death" has been filmed by a BBC crew. With timelapse cameras, specialists recorded salt water being excluded from the sea ice and sinking. The temperature of this sinking brine, which was well below 0C, caused the water to freeze in an icy sheath around it. Where the so-called "brinicle" met the sea bed, a web of ice formed that froze everything it touched, including sea urchins and starfish. The unusual phenomenon was filmed for the first time by cameramen Hugh Miller and Doug Anderson for the BBC One series Frozen Planet. Creeping ice The icy phenomenon is caused by cold, sinking brine, which is more dense than the rest of the sea water. It forms a brinicle as it contacts warmer water below the surface. Mr Miller set up the rig of timelapse equipment to capture the growing brinicle under the ice at Little Razorback Island, near Antarctica's Ross Archipelago. "When we were exploring around that island we came across an area where there had been three or four [brinicles] previously and there was one actually happening," Mr Miller told BBC Nature. The diving specialists noted the temperature and returned to the area as soon as the same conditions were repeated. "It was a bit of a race against time because no-one really knew how fast they formed," said Mr Miller. "The one we'd seen a week before was getting longer in front of our eyes... the whole thing only took five, six hours." Against the odds The location - beneath the ice off the foothills of the volcano Mount Erebus, in water as cold as -2C - was not easy to access. "That particular patch was difficult to get to. It was a long way from the hole and it was quite narrow at times between the sea bed and the ice," explained Mr Miller. "I do remember it being a struggle... All the kit is very heavy because it has to sit on the sea bed and not move for long periods of time." As well as the practicalities of setting up the equipment, the filmmakers had to contend with interference from the local wildlife. The large weddell seals in the area had no problems barging past and breaking off brinicles as well as the filming equipment. "The first time I did a timelapse at the spot a seal knocked it over," said Mr Miller. But the team's efforts were eventually rewarded with the first ever footage of a brinicle forming. HOW DOES A BRINICLE FORM? Dr Mark Brandon Polar oceanographer, The Open University Freezing sea water doesn't make ice like the stuff you grow in your freezer. Instead of a solid dense lump, it is more like a seawater-soaked sponge with a tiny network of brine channels within it. In winter, the air temperature above the sea ice can be below -20C, whereas the sea water is only about -1.9C. Heat flows from the warmer sea up to the very cold air, forming new ice from the bottom. The salt in this newly formed ice is concentrated and pushed into the brine channels. And because it is very cold and salty, it is denser than the water beneath. The result is the brine sinks in a descending plume. But as this extremely cold brine leaves the sea ice, it freezes the relatively fresh seawater it comes in contact with. This forms a fragile tube of ice around the descending plume, which grows into what has been called a brinicle. Brinicles are found in both the Arctic and the Antarctic, but it has to be relatively calm for them to grow as long as the ones the Frozen Planet team observed.
iPad storyteller Joe Sabia introduces us to Lothar Meggendorfer, who created a bold technology for storytelling: the pop-up book. Sabia shows how new technology has always helped us tell our own stories, from the walls of caves to his own onstage iPad.
Schematics are the functional diagram of electronic circuits. With so many designs available on the web, understanding how to read schematics can unlock a world of possibilities for the electronics maker. In fact, if you can read a schematic, you can build a circuit before even understanding how it works!
This is my video response to James Houston's remix of Radiohead's Nude. I decided to try my own version with Funkytown by Lipps Inc. I only used computers from the early 1980's that were destined for the Junk Yard and this is how I got the idea for JunkyTown. I also used a modem but DTMF tones are lousy for musical notes (no harmonics) but I was very lucky to find two notes that did sound good. On your phone punch in 3 3 2 3 and you got the beginning part of the solo and the rest is history. Please note no synthesizer or audio effects were used and all the audio was recorded from a microphone or direct line. Some of the audio was amplified when it was mixed down because the levels were too low ie. the printer and modem. The Commodore 64 was used for the main Bass and Guitar. The Ti-99/4A was used for the second part of the solo because of the limitation of DTMF tones. It was tempting to just sample the modem but I did not in order to keep it 100% original. It was difficult to video tape the printer because it kept shaking the table so I looped the printer video in the begining of the video. The printer sometimes caused the harddrive head to shake out of sync so I inserted a screw into the mechinism and this some what helped. 90% of the work was put into the audio and very little effort was put into the video and I think this did affect the overall results. James Cochrane
You may have heard about Apple's new service Siri on the buzz... well here it is in all its glory, Thanks to our friends at www.collegehumour.com
Please Like & Share it ( if you enjoyed ) Thanks for your support ??? Facebook: http://www.facebook.com/BashirSultani Twitter: http://twitter.com/bashsultani Google+ http://gplus.to/BashirSultani REAL TIME - 40 min. I REUSE THE SAME SALT ALL THE TIME TOOLS: 1-2 FULL SHAKER OF ANY FINE SALT +PIECE OF SHARP PAPER + iPHONE4 + iMOVIE PATIENCE Awesome remix by UltraHyperShadow http://www.youtube.com/user/UltraBrawl
Steve Harvey exhibits lamentable ignorance and continues his atheist hate speech.
Scientists are on the verge of answering one of the greatest questions in history: Are we alone? Combining the latest telescope images with dazzling CGI, Life Beyond Earth will immerse audiences in the sights and sounds of alien worlds, while top astrobiologists explain how these places are changing how we think about the potential for life in our solar system. We used to think our neighboring planets and moons were fairly boring -- mostly cold, dead rocks where life could never take hold. Today, however, the solar system looks wilder than we ever imagined. Powerful telescopes and unmanned space missions have revealed a wide range of dynamic environments -- atmospheres thick with organic molecules, active volcanoes, and vast saltwater oceans. This ongoing revolution is forcing scientists to expand their ideas about what kinds of worlds could support life. And if we do find primitive life forms elsewhere in the solar system, it may well be that life is common in the universethe rule, and not the exception.
One more incredibly cool video from research diver, musician, and filmmaker Henry Kaiser. Henry says: "Since support workers in town cannot make their usual recreational trips out onto the sea ice, the powers-that-be at McMurdo Station installed the OB TUBE within walking distance of town. Anyone can climb down the ladder and watch us divers at work under the ice. The snow was bulldozed off of the sea ice around the observation tube, creating a very light environment; which seems to have attracted an enormous population of larval and juvenile ice fish that form great clouds around the tube."
The Randi Show is a biweekly video podcast produced by the James Randi Educational Foundation. James Randi himself discusses news from the world of science, pseudoscience, and the paranormal. Plus, he shares some stories from his amazing life. In this episode, Randi explores the latest news in cold fusion. Has it finally been achieved?
Does science ruin the magic of life? In this grumpy but charming monologue, Robin Ince makes the argument against. The more we learn about the astonishing behavior of the universe -- the more we stand in awe.
A "Ghost Light" is an unexplained luminescent phenomena. That's how aliens might see Earth if they arrived with no awareness of its civilizations, atmosphere and climate, and magnetic field. Astronauts aboard the International Space Station are all too familiar with the city lights, the thunderstorms, and the aurorae that turn Earth into a planet of soft glows and flickering beams. This video has been made up of timelapse sequences captured aboard the ISS. Enjoy in 1080p!
Time Twister consists of two LEGO Mindstorms bricks communicating via Bluetooth. The master brick keeps track of the time and handles the minute digits. The slave brick handles the hour digits and the second indicator. Each digit is made up of five layers with black and white tiles layed out in different patterns. Each layer can rotate 360 degrees before it hooks to the next layer. By twisting the top layer back and forth in a specific pattern, you can arrange the layers so that the desired digit is displayed. http://tiltedtwister.com
In high-res 1080p. Explores one of the deepest mysteries about the origin of our universe. According to standard theory, the early moments of the universe were marked by the explosive contact between subatomic particles of opposite charge. Featuring short interviews with Masaki Hori, Tokyo University and Jeffrey Hangst, Aarhus University. Scientists are now focusing their most powerful technologies on an effort to figure out exactly what happened. Our understanding of cosmic history hangs on the question: how did matter as we know it survive? And what happened to its birth twin, its opposite, a mysterious substance known as antimatter?
blippar has helped Mercedes-Benz create the worlds first ever augmented reality advertising campaign in car showrooms as part of the Escape The Map campaign.