ripples.jpg http://scienceblogs.com/chaoticutopia/2006/09/friday_fractal_xviii.php
ocean-ripples.jpg http://science.nationalgeographic.co.uk/science/photos/coastlines-gallery/arctic-ocean-ripples.html
zengarden.jpg http://www.ehow.com/how_4806806_build-own-minizen-garden.html
zebra.jpg http://photomural.wordpress.com/2008/03/11/zebra-photo-mural/ dunes_titan.jpg http://www.physorg.com/news170435933.html
titanearth.jpg http://www.nasa.gov/mission_pages/cassini/whycassini/cassinif-20080502.html
cloud.jpg http://www.flickr.com/photos/awynhaus/3217703389/