A recent investigation revealed that over 30,000 medical research papers, published over decades, are now invalid due to contaminated cells. In many cases scientists who believed they were working on human cells were in fact working on mouse cells, others thought they had lung cells, but had liver instead. This is bad for science. Willem Halffman and Serge Horbach, researchers at Radboud University published a report showing that special “immortal cells” have been allowed to contaminate other cell-lines causing misidentification. According to them, this is a “result of mislabelled samples, cross-contaminations, or inadequate protocols.” How did this happen? The simplified…

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