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Sea urchin

The green fluorescent label maps the distribution of calcium in sea urchin larvae. The label shows the elongated mineralized spicules and vesicles with large amounts of calcium

How do creatures like sea urchins take up the calcium they need to build hard structures? 

Scanning electron microscope image of a sea urchin spine undergoing repair after breakage.


Scientists look to biology to learn how living organisms create the amazing variety of forms and substances...

Sea urchin digging teeth are designed to stay sharp

Sea urchins dig themselves hiding holes in the limestone of the ocean floor using teeth that don’t...

How the Sea Urchin Grows New Spines

A team of scientists at the Weizmann Institute of Science has shown how sea urchins grow new spines.