The document discusses two social media sites for academics: Academia.edu and ResearchGate. Academia.edu was launched in 2008 and allows users to share papers, view analytics on paper downloads and profile views, and follow other researchers. ResearchGate was founded in 2008 by physicians and a computer scientist and has over 5 million members. It functions as a social network for scientists, allowing them to share papers, ask and answer questions, find colleagues in their fields, and view profiles of researchers with similar interests. Both sites aim to facilitate collaboration and sharing of research among academic communities.