Evolution line from sponge to man
<a href="//commons.wikimedia.org/wiki/User:Micheletb" title="User:Micheletb">Michelet-密是力</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Micheletb" title="User talk:Micheletb"><span class="signature-talk">talk</span></a>)
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<span class="int-own-work" lang="en">Own work</span>