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After careful review
Osteoderm formation usually begins with small nodules of cartilage around which more dense material forms
They were recovered from the historic Bone Cabin Quarry in Montana
one of the oldest relatives of the modern rhino
Sea Urchin rockinaboxcelt After careful reviewAbove: Front of the Specimen Card 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 places where those oceans once were and have
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