hub

Sci-Hub is a website that provides free access to millions of research papers and books, without regard to copyright, by bypassing publishers' paywalls in various ways.Sci-Hub was founded by Alexandra Elbakyan in 2011 in Kazakhstan in response to the high cost of research papers behind paywalls. The site is extensively used worldwide. In September 2019, the site's owners said that it served approximately 400,000 requests per day. The number of articles claimed is frequently updated on the site's home page, being over 81 million in April 2020.
Sci-Hub and Elbakyan were sued twice for copyright infringement in the United States in 2015 and 2017, and lost both cases, leading to loss of some of its Internet domain names. The site has cycled through different domain names since then.Sci-Hub has been lauded by some in the scientific, academic, and publishing communities for providing access to knowledge generated by the scientific community. Others have criticized it for violating copyright, threatening the economic viability of publishers, potentially compromising universities' network security, and jeopardizing legitimate access to papers by university staff.

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