oops! I should check my typing when posting names. Firefox underlines them as spelling errors because they're not in the spelling dictionary, and I just ignore them instead of checking. Hopefully, a mod will correct the title.
It is indeed sad news. I guess that a consequence of us living when we do is that so many great minds in science did their thing so long ago that one can't expect them to be around that much longer. On the other hand, a lot of them, either directly or through spin-offs from their discoveries, are responsible for their own longevity and our current quality of life. As an example, the boost in medical science resultant of NASA space medicine research.