Dec 05

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Ocean Acidification: The Other Carbon Problem

Scientists call ocean acidification "the other carbon problem." When the ocean absorbs carbon dioxide from the atmosphere, it raises the pH of the water making it acidic. That shift makes sea animals' shell brittle, which makes a huge difference to…

AIDS awareness posters were part of domestic and international public health campaigns to promote HIV testing, safe sex and better knowledge of the virus and disease. Here is a sample of the 6200 posters physician Edward Atwater collected that are…