Everything around you is made of elements that scientists have studied in quite some detail over the last 200 years. But all that understanding breaks down when these elements are subjected to high pressure and temperature. Now, using an advanced theoretical understanding and extreme conditions, researchers have converted table salt into exotic chemicals. Salt is made from one part sodium (Na) and one part chlorine (Cl). If somehow salt were transported to the center of the Earth, where the pressure is three million times that on the surface, its crystalline structure would change but the ratio of those two elements would remain the same. Vitali Prakapenka at the University of Chicago and his colleagues wanted to find out what would happen if there were an excess of either sodium or chlorine at such high pressures. Would the ratio between the elements change? “It might,” said Prakapenka, “because chemistry completely changes in such conditions.” If it did, the result would not just be formation of a new compound, but a serious revision of what we think about chemistry. Read 11 remaining paragraphs | Comments
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Scientists make exotic chemicals with high-pressure salt
In 2008, the British Library, in partnership with Microsoft, embarked on a project to digitize thousands of out-of-copyright books from the 17 th , 18 th , and 19 th centuries. Included within those books were maps, diagrams, illustrations, photographs, and more. The Library has uploaded more than a million of them onto Flickr and released them into the public domain. It’s now asking for help. Though the library knows which book each image is taken from, its knowledge largely ends there. While some images have useful titles, many do not, so the majority of the million picture collection is uncatalogued, its subject matter unknown. Next year, it plans to launch a crowdsourced application to fill the gap, to enable humans to describe the images. This information will then be used to train an automated classifier that will be run against the entire corpus. Read 1 remaining paragraphs | Comments 
