Diatoms
<p>
<a href="http://upload.wikimedia.org/wikipedia/commons/2/29/Diatom2.jpg">
http://upload.wikimedia.org/wikipedia/commons/2/29/Diatom2.jpg</a>
<p>

Reflections
<p>
<a href="http://www.mathsisfun.com/geometry/reflection.html">
http://www.mathsisfun.com/geometry/reflection.html</a>