Sea Urchin lunarhighlands This specimen is a precision-cut

This specimen is a precision-cut segment of ladder rung from the Khumbu Glacier on Mount Everest

the City of Masks

000 years ago) - "The Great Dying" is the largest extinction event in the history of the planet

Walter Alvarez

Sea Urchin lunarhighlands This specimen is a precision-cutAbove: 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