Magnifying glass for the closer examination of a sea urchin with bite marks of a bullhead shark from Cretaceous in Museum für Naturkunde Berlin, Germany.
<a href="//commons.wikimedia.org/wiki/User:Sebastian_Wallroth" title="User:Sebastian Wallroth">Sebastian Wallroth</a>
2009-02-28
<span class="int-own-work" lang="en">Own work</span>