I mean, it's pretty logical. If you're a research lab, and you put out a result every week, and each result is 95% likely to be true, then you would expect 2 and a half false findings a year, and your probability of putting out nothing but true findings in a given year would be <10%.
This very famous PLoS paper "Why Most Published Research Findings Are False" is super fun to read if you want to really shake your faith in the enterprise of scientific and academic publishing:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1182327/