Did not see those facts in the obituaries!
I met him once; it was interesting to meet someone who had not been on the reservation for years - it was an odd experience to meet an authority who had no respect for authority. I don’t think that I appreciated his writing until I was older - I was more of an Asimov/Clarke fan. OTOH, he didn’t consider himself to even be in the same “business” as Asimov and Clarke.