havent finished benjamin's "work of art in the age of mechanical reproduction" (3 different people told me to read the essay in one day!), but these were some of the excerpts that interested me...
"Even the most perfect reproduction of a work of art is lacking in one element: its presence in time and space, its unique existence at the place where it happens to be." p. 220 (from _illuminations_)
"One might subsume the eliminated element in the term 'aura' and go on to say: that which withers in the age of mechanical reproduction is the aura of the work of art. This is a sympomatic process whose signifiance points beyond the realm of art." pg. 221 (ibid.)
"During long periods of history, the mode of human sense perception changes with humanity's entire mode of existence. The manner in which human sense perception is organized, the medium in which it is accomplished, is determiend not only by nature but by historical circumstances as well." 222(ibid.)
"The concept of aura which was proposed above with reference to historical objects may usefully be illustrated with reference to the aura of natural ones." ibid.