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