Purple sea urchin in beaker 'Ocean Babies on Acid' focuses on an experiment to study the effects of ocean acidification on sea urchin larvae off the California and Oregon coasts. The goal is to find out if the increased acidity caused in part by increased CO2 levels in the atmosphere makes it difficult for marine species to grow their shells. To do this, scientists create a 'Time Machine' in the lab that takes the Ocean Babies to the ocean of the future.—Anonymous