Thanks, Jeffrey Cohen, for having me read Roger Caillois's The Writing of Stones. Now any time I think Nature has made art, or anything vaguely anthropomorphic, I'm obsessed by it.
By the way, I recommend the book to anyone trying to imagine a nonanthropormorphic approach to art. As longtime readers of this blog know, Roger Caillois (see here and especially here) is my favorite surrealist biologist.
(thanks, Liza! I promise not to stare intimidatingly in your direction ever again)