Stephen Downes

If you've noticed that the URL sci-hub.io is no longer resolving, this is the result of an injunction by Elsevier, which argues that the website, which shares academic papers, is a form of piracy. However, according to this article, "several ‘backup’ domain names are still in play, including Sci-Hub.bz and Sci-Hub.cc. This means that the site remains accessible to those who update their bookmarks. In addition to the alternative domain names users can access the site directly through the IP-address 31.184.194.81, or its domain on the Tor-network, which is pretty much immune to any takedown efforts." See also: Meet the Robin Hood of Science.