I was today years old when I learned what beavers eat. They eat plants. Any stem smaller than about 2cm. Alder, willow. That sort of thing. Aspen is a fav.
You might be seeing the word 'pre-print' in the media a lot lately, as people report on COVID-19 preprints Here is what a pre-print IS.https://www.healthnewsreview.org/2020/04/strong-caveats-are-lacking-as-news-stories-trumpet-preliminary-cov