Scientists spotted the millipedes in caves on opposite sides of the Grand Canyon <http://www.livescience.com/amazingimages/cte.php?guid=4536b0ff475850.48246805&cat=l>. One species was found in a cave on the South Rim and the other in two caves on the North Rim. See complete article with photos at: http://www.msnbc.msn.com/id/17400829/