This is not acceptable. A scientist cannot make a public claim of discovering something that s/he knows had already been discovered by others. I know it is obvious but that is exactly what happened in this press release of @theDESurvey @fermilab

@Fermilab +..
The lead author, Yuanyuan Zhang, claims that "we discovered that intracluster light is a pretty good radial tracer of dark matter", which sounds awfully similar to...+

@Fermilab +... this 2019 paper by Mireia Montes and Ignacio Trujillo (MT19) "Intracluster light: a luminous tracer for dark matter in clusters of galaxies"

@Fermilab +...Could it be that the authors were not aware of the MT19 work? No. I mean, it's not like MT19 was an obscure paper published in a small journal 30 years ago. It was published last year in one of the top astronomy journals... AND... +

@Fermilab +...AND... NASA made a press release about it:

https://t.co/yJ3crQjWwT

That in addition to their home institution @IAC_Astrofisica press