Cretaceous Sea Urchin Pendant Necklace Size:Large (Bezel) The jar is enclosed inside

The jar is enclosed inside a classic

DIMETRODON (Spine Sail)

In the southeastern spur of North Africa’s Great Sand Sea

Scientific experiments featured heavily in the rotation

This specimen is a Roman arrowhead

Cretaceous Sea Urchin Pendant Necklace Size:Large (Bezel) The jar is enclosed insideAbove: Artist's Concept of the Tethys Sea during the Cretaceous (Source: Mini Museum) Ancient sea urchins, small and spiny creatures, have existed for millennia. These echinoids first appeared in oceans 450 million years ago, where they fed on algae and sponges. Their flexible spines purpose was two fold: to protect against predators and allow for the slow crawl towards the urchins next meal. Buried for millions of years, their fossils appear in many