From time to time a quick visit to retractionwatch.com is a good way to understand how often Research papers have issues, from very minor ones up to something s

From time to time a quick visit to retractionwatch.com is a good way to understand how often Research papers have issues, from very minor ones up to something so big that it seems impossible that the article managed to be published at all. It is really sad how diffused are let's say less-than-fully-ethical practices among scientists (even if of course the cheaters are a minority).