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3D printing provides an opportunity to change the way we think about the world around us.  It merges the physical and the digital. People on opposite sides of the globe can collaborate on designing an object and print out identical prototypes every step of the way. Instead of purchasing one of a million identical objects built in a faraway factory, users can customize pre-designed objects and print them out at home. Just as computers have allowed us to become makers of movies, writers of articles, and creators of music, 3D printers allow everyone to become creators of things.
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Engineers at MIT are tinkering with all sorts of advanced solar power technology, like self-assembling solar cells, virus-structured cells and an artificial leaf system that mimics photosynthesis. Their latest project is somewhat more simple: It can be printed on a regular sheet of paper.
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Manufacturing and retail could get a much- needed boost from a newly- developed 3D chocolate printer.In the long term the technology could be used by customers to design many different products themselves - tailor-made to their needs and preferences.Using new digital technology the printer allows you to create your own designs on a computer and reproduce them physically in three dimensional form in chocolate.