After suffering from myelodysplasia for two years, and receiving three bone marrow transplants from his sister Cari, Sagan died of pneumonia at the age of 62, at the Fred Hutchinson Cancer Research Center in Seattle, Washington, in the early morning of December 20, 1996. – https://en.wikipedia.org/wiki/Carl_Sagan#Death
…Carl Sagan is a beautiful guy, but…
If he would have done Taoist skeletal practices intensively enough , he might been able to avoid that kind of nasty cancer which he had, but who knows.
…too much indulgence …or especially in) spirituality…
In seems to be that all religions are nothing else than cheating and also with yogic methods the mos important thing is to have immense amount of time; it’s less important to know many traditional techniques than have privacy and isolation.