It was decided we don't know enough about the sea. So 2,700 scientists started the Census of Marine Life, cooperating with museums, labs and aquariums across 80 countries to learn more. 10 years later, today, they're done.
The world's first Census of Marine Life was released today, a 10 year, 650 million dollar study of the ocean. In Citizens of the Sea, Nancy Knowlton discusses the shell-crushing force of the Mantis Shrimp and the ribbon worm.