If There Ever Was - A Book of Extinct and Impossible Smells
The book that came out of this unusual smell-art exhibit is now available to the public, and one can experience these uncomfortable scents at the comfort of his/her own home. These include the hypothetical scents of the atomic bomb exploding on Hiroshima, the scent of the sun, extinct botanical species and the smell of communism. The concept was conceived by curator Robert Blackson for an exhibit of that name, and perfumers Bertrand Duchaufour, Christoph Hornetz, Mark Buxton, Christophe Laudamiel, Geza Schön and Sissel Tolaas created these as scents.
Thanks to Steven for the tip and for the link to the NY Times article.