Anna, Tim Wegner's book, "Fractals for Windows", says: " A fractal is a mathematical object that has detailed structure no matter how closely you look at it, no matter how great the magnification." I hope this helps. Bill Rossi <A HREF="http://members.aol.com/billatny">http://members.aol.com/billatny</A> <A HREF="http://www.arts4u.org/rossi">http://www.arts4u.org/rossi</A>