showed? Cant be stopped, definitely inevitable, so no
point worrying about it.
And with further questioning about immortality, they will
reply as follows.
Immortality, you ask? Well, thats a Greek myth, isnt
it? Nothing to do with biology. Everything dies, so
immortality cant be a real thing, no way. Its a joke
played on us by religions.
So saying, Professor Corngold will shake his head with relief,
grateful that there was at least one question he could answer
without having to refer to a textbook.
AN APPROPRIATE TERMINOLOGY FOR AGING AND
Yet, very few of the superstitions that biologists and medi-
cal doctors believe about aging, immortality, and death are
true. To explain this, some refinements of terminology are
The most objective definition of aging is that which occurs
when rates of survival or reproduction inexorably decline,
even when organisms are kept in excellent environments, in
which contagious disease has been virtually eliminated, with
abundant food and no prospect of being eaten.  Some
people like definitions of aging that include falling perfor-
mance, increasing pigment levels, reduced cell replication,
and so on indefinitely. But these definitions depend on the
particulars of the biology of the organism. By contrast, all
organisms have rates of survival and reproduction and when
survival probabilities fall to low enough values, organisms die.
It is also important to exclude all reasonable external agents