I was wondering... given that this was indeed discussed extensively before (the original write up shared) is this Smithsonian post even supposed to be shared? I would have guessed it would simply be ignored.
Dupes have more to do with how close they are to each other. The same article posted months apart isn't a dupe, different articles on the same subject posted hours apart is a dupe.
It's not automatic, but sometimes the mods decide manually to mark it as a dupe when the new one has no additional information and the other had a big discussion.
