Universe May Be Curved, Not Flat: Scientific American
September 26, 2013 at 1:30:01 PM GMT+2 * - permalink -

- http://www.scientificamerican.com/article.cfm?id=universe-may-be-curved-not-flat&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+ScientificAmerican-Global+(Content:+Global)