Bitcoin May Favor the Selfish

The virtual currency Bitcoin may have a fundamental flaw according to two Cornell University professors. And they’re not talking about its lack of official recognition or oversight. Emin Gun Sirer, who specialises in operating systems and networking, discusses the piece in a post on the “Hacking, Distributed” blog in which he details a paper he […]

3D Metal Printing Gets a Boost


The European Space Agency is heading a project to make 3D printing using metals more viable. Using a tactic appropriately similar to the cliché of “reaching for the stars”, the agency has a long-term target of “printing” a satellite as a single-part object. The ESA showed off some of the existing technology at the Science […]