“Jane Galt” (Megan McArdle) remarks in passing that “our bodies aren’t really up to the strain of physical labor for our new, improved lifespans.” Which reminds me of a puzzler: In all those stories where a drug/virus confers immortality, what about wear on teeth? Do Tolkien’s Elves grow a new set every century or so, or are their teeth simply made of stronger stuff?
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Ken MacLeod, Dark Light, chapter 11.
Elves probably stop bothering to eat after N ages. Maedhros survived being stapled to a cliff for years during which Melkor probably didn’t feed him.