I was in a doctor’s office and saw an infant’s skeleton. Do I have to publicize this to make kohanim aware? can I assume that it is NOT from a Yid?
It is hard to imagine that the skeleton is real, and not just an imitation made out of plastic etc., but if it indeed is real, yes you should let kohanim know this. Even if the skeleton is not of a Yid, kohanim should not be metameh even to goyim.
Shulchan Aruch Y:D 372-2.