<p>Just one reason why humans did not exist during this era ...
</p>
<i>Dimetrodon</i> our Ancestor.<br>June 16 - 27, 2003
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/50601122@N00">Dylan Kereluk</a> from White Rock, Canada
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/50601122@N00/3629374">Flickr</a>