Ever wanted to have an RSS feed in Lemmy? Well now you can!
rss.ponder.cat is set up to mirror any RSS feed into a community. You can subscribe to the feed like any other community and you'll get every new story as a Lemmy post.
Phys.org does what some of the others do, offer a massive menu of options for the RSS feeds. I picked out their top stories feed only, to cut down on spam. I don't want to have a huge list of bot-posted communities with no activity. Are there any of the specific ones that you want to have, besides the top headlines?