Two mice; the mouse on the left has more fat stores than the mouse on the right.
<p>The original uploader was <a href="https://en.wikipedia.org/wiki/User:Bigplankton" class="extiw" title="wikipedia:User:Bigplankton">Bigplankton</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>.
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Later versions were uploaded by <a href="https://en.wikipedia.org/wiki/User:Sunholm" class="extiw" title="en:User:Sunholm">Sunholm</a> at <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>.
<a rel="nofollow" class="external text" href="http://www.csm.ornl.gov/SC99/GENwall.html">Human Genome wall for SC99</a> on ornl.gov. Copied from <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>; description page is/was <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Image%3AFatmouse.jpg">here</a>.