As happens far too often on HN, the link there is to the blogspam site phys.org rather than to the original source.)
This is not a problem at all unique to HN.
It's actually somewhat less of a problem on Hacker News than many sites, because the editors there will proactively change the source to the more canonical. For example, this particular post now points to the original article.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.