So, one angle I'm interested in is the surfacing of new sources of good information. For example, many popular sites are basically just aggregators of content

So, one angle I'm interested in is the surfacing of new sources of good information. For example, many popular sites are basically just aggregators of content from other sources, with perhaps a little light commentary on top. Many years ago, I might have gone to Slashdot for the commentary from the site members, but that devolved into a festering sewage pit a long time ago. But slashdot does still sometimes link to good articles -- you just have to ignore all the commentary on the site. So, how do you keep discovering good sources of content and feeding them into the system? If I wanted to feed a bunch of sites into the system and let you do the work of filtering them for me, how would I go about that? Another angle I'm interested in is the deduplication of content, and hoisting the value of the earlier posts over the later ones that are just regurgitating what some other site said? And related to that, how do you surface newer posts that are actually an update to the older article, with new information? Any thoughts or observations you can share?