Cretaceous Sea Urchin Pendant Necklace Size:Large (Bezel) Scientific experiments featured heavily in

Scientific experiments featured heavily in the rotation

This specimen is a Roman arrowhead

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Please Note: Each fossil is a unique creature that lived more than 66

Cretaceous Sea Urchin Pendant Necklace Size:Large (Bezel) Scientific experiments featured heavily inAbove: 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