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DIMETRODON (Spine Sail)
The jar is enclosed inside a classic
" Laser Radar Technology and Applications IX
Scientific experiments featured heavily in the rotation
This specimen is a Roman arrowhead
Cretaceous Sea Urchin Pendant Necklace Size:Large (Bezel) DIMETRODON (Spine Sail)Above: 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
