ScienceBlogs is an invitation-only blog network and virtual community. It was created by Seed Media Group in 2006 to enhance the public understanding of science. As of February 2009, ScienceBlogs hosted 75 blogs dedicated to various fields of research. Each blog has its own theme, specialty, and author(s) and is not subject to editorial control. Authors include active scientists working in industry, universities and medical schools as well as college professors, physicians, professional writers, graduate students, and post-docs.According to Technorati, as of 7 July 2007, ScienceBlogs had an "authority" of 9,581 and its number of inbound links ranks it 37th among blogs worldwide.