Display of the periodic table of the elements, complete with samples of many of them, in the Houston (Texas, USA) Museum of Natural Science, photographed on 26 June 2010.
<a href="//commons.wikimedia.org/wiki/User:Euthman" title="User:Euthman">Ed Uthman</a>, Houston, Texas, USA
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>