A research paper is a special publication written by scientists to be read by other researchers. Papers are primary sources neccessary for research – for example, they contain detailed description of new results and experiments.
At this time the widest possible distribution of research papers, as well as of other scientific or educational sources, is artificially restricted by copyright laws. Such laws effectively slow down the development of science in human society. The Sci-Hub project, running from 5th September 2011, is challenging the status quo. At the moment, Sci-Hub provides access to hundreds of thousands research papers every day, effectively bypassing any paywalls and restrictions.
It's so good to see that some Russian folks are doing this (why is it always the Russians?)
Here's hoping scholars will have free access to science research for the decades to come.