franzanth: We know today that sea stars and se…

franzanth:

We know today that sea stars and sea urchins have radial symmetry. Some of their fossil relatives like Pleurocystites were much weirder, with body shapes that look nothing like their living cousins. 

Tumblr is now blocked here so I won’t post often. Follow me elsewhere:

Facebook · Instagram · Twitter · Ko-fi · Patreon · Shop