Sci-Hub is an online repository of over 51,000,000 scientific academic papers and articles, available through its website. New papers are uploaded daily after accessing them through educational institutions. Founded by Alexandra Elbakyan from Kazakhstan in 2011, it began as a reaction to the high cost of research papers behind paywalls, typically US$30 each when bought on a per-paper basis. Academic publisher Elsevier has in 2015 filed a legal complaint in New York City alleging copyright infringement by Sci-Hub.
As a specialist in intellectual property, I already knew that research articles were being compromised at an alarming rate. But the bad news has just kept on coming. R. G. Steen found that retractions have increased 10-fold in the last decade, most of them in medical journals.