Which are older—the atoms in the body of an elderly person or the atoms in the body of a baby? (a) A baby’s atoms are older because this is surely a trick question. (b) An elderly person’s are older...

Which are older—the atoms in the body of an elderly person or the atoms in the body of a baby?

(a) A baby’s atoms are older because this is surely a trick question.

(b) An elderly person’s are older because they have been around much longer.

(c) The atoms are the same age, which is appreciably older than the solar system.

(d) The atoms’ ages depend on the person’s diet.