I was recently introduced to the work of Nina Katchadourian, and I got excited about an artist for the first time in a while. I loved her "Mended Spiderwebs Series," where she glued thread together to "repair" missing sections of damaged spiderwebs. Sometimes, the spider would return and summarily remove the foreign addition. The use of a more obviously visible material to accent the contrast is beautiful, and the concept of aiding or improving nature is called into question brilliantly. Her work can be seen at: http://www.ninakatchadourian.com/index.php