Earth's acid test: When did ocean acidity allow life to commence? / 3D ocean model shows ocean acidification moving deeper as atmospheric emissions increase / Ocean acidification is reaching deeper waters / Ancient climate study links past ocean acidification to current trends / Ocean warming and acidification threaten key ocean plankton groups, study warns / Climate change and the threat of ocean acidification / Oceans turning acidic: This can wipe out marine life / World's oceans near critical acidification level: Report / As ocean surfaces acidify, a deep-sea acidic zone is expanding, and marine habitats are being squeezed / Ocean acidification turns certain fish species away from coral reefs, researchers find