A previously unknown virus has been found to occur worldwide in the most widely studied plant species, thale cress ( Arabidopsis thaliana ). The presence of the virus, which was discovered by researchers at Utrecht University and Wageningen University & Research, potentially has far-reaching implications for research projects. In an article in the scientific journal New Phytologist , the researchers advise plant scientists to screen their thale cress seeds for the presence of the virus before u…