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Which Came First, the Head or the Brain?

  • Robin Mejia mail

    Affiliation: Freelance Science Writer, Albany, California, United States of America

  • Published: February 19, 2013
  • DOI: 10.1371/journal.pbio.1001484

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sea urchin?

Posted by pasby on 23 Feb 2013 at 22:46 GMT

Fascinating article,but where did the sea urchin mentioned in the last paragraph, come from?

No competing interests declared.