Sea Urchin chemistry A small information card is

A small information card is also included

which is over 66

plesiosaurs

is estimated to have had an area of half a mile

Our target size is approximately 1x1 cm

Sea Urchin chemistry A small information card isAbove: 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