The science platform is tightening its rules again: Anyone who passes off AI garbage as science will be banned – and then scrutinized more closely.

Arxiv, the influential preprint server where researchers worldwide publish their work before formal peer review, is tightening its rules on AI-generated content.

The change comes as arXiv and others struggle to manage an influx of AI-generated materials masquerading as rigorous science.

One of the site's moderators described the new policy on social media.