Sea Urchin chemistry 500 years ago

500 years ago

is estimated to have had an area of half a mile

A small information card is also included

Average weight is roughly 0

Egyptian artisans began working with it the following millennium

Sea Urchin chemistry 500 years agoAbove: 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