mad scientist with a transparent background
<ul><li>Converted from JPEG to PNG by <a href="//commons.wikimedia.org/w/index.php?title=User:Wapcaplet&amp;action=edit&amp;redlink=1" class="new" title="User:Wapcaplet (page does not exist)">User:Wapcaplet</a>.</li>
<li>Traced as an SVG by <a href="//commons.wikimedia.org/wiki/User:Antilived" title="User:Antilived">User:Antilived</a>.</li>
<li>Background removed and edited SVG by <a href="//commons.wikimedia.org/wiki/User:Zzyzx11" title="User:Zzyzx11">User:Zzyzx11</a>.</li></ul>
CC BY-SA 3.0
<a href="//commons.wikimedia.org/wiki/File:Mad_scientist.svg" title="File:Mad scientist.svg">File:Mad scientist.svg</a> (Caricature of a <a href="//commons.wikimedia.org/wiki/File:Mad_scientist_caricature.png" title="File:Mad scientist caricature.png">mad scientist drawn by User:J.J.</a>)