A porcupine endoskeleton
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/28567825@N03">Cliff</a> from I now live in Arlington, VA (Outside Washington DC), USA
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/28567825@N03/3588052844/">Bornean Porcupine (Thecurus crassispinis)</a>