A Coast Guard plan to build new icebreakers may be in trouble

Congress’ investigative arm says the polar ships may take longer to build and cost more than expected. But pushing the project off could be a bigger problem.

Nutrient runoff starves corals in the Florida Keys

Rising ocean temperatures, a consequence of climate change, are known for bleaching and killing corals. But a study, published today in Marine Biology, reveals another overlooked culprit: excess nitrogen.

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