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Cod bones from Mary Rose reveal globalized fish trade in Tudor England

New stable isotope and ancient DNA analysis of the bones of stored cod provisions recovered from the wreck of the Tudor warship Mary Rose, which sank off the coast of southern England in 1545, has revealed that the fish in the ship’s stores had been caught in surprisingly distant waters: the northern North Sea and the fishing grounds of Iceland – despite England having well developed local fisheries by the 16th century.

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Team traces elevated mercury levels in coastal seawater to hair shed by elephant seals in annual…

As fish-eating predators at the top of the marine food chain, elephant seals accumulate high concentrations of mercury in their bodies. A new study by scientists at UC Santa Cruz shows that elephant seals shed significant amounts of mercury during molting, resulting in elevated concentrations of the toxic metal in coastal waters near the elephant seal rookery at Año Nuevo State Reserve.

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Loons return faithfully to the same wintering sites year after year

Common Loons (Gavia immer) nest on lakes across Canada and the northern U.S., but every winter they disperse, many to the open ocean where they’re difficult to track. It’s been well established that many loons return to the same nesting sites every spring, but new research in The Condor: Ornithological Applications shows for the first time that they are similarly faithful to their wintering sites

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White-tailed eagles avoid large bullet fragments during consumption of carcasses

White-tailed eagles detect and avoid the ingestion of large metal particles (larger than 8 mm) but ignore smaller metal particles whilst feeding on shot mammalian carcasses. Lead-based bullets split into numerous small metal fragments when penetrating an animal’s body, whereas lead-free rifle bullets either deform without leaving any particles in the tissue or fragment into larger particles

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Researchers develop technique to produce a direct image of the DNA helix and its inner structure

Enzo di Fabrizio and his team have developed a new technique to produce a direct image of the DNA helix and its inner structure. This is the first time scientists have ever been able to produce an image of DNA that allows a direct visual evaluation of quantitative and qualitative characteristics of the building blocks of life.

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Increasingly severe disturbances weaken world's temperate forests

Longer, more severe, and hotter droughts and a myriad of other threats, including diseases and more extensive and severe wildfires, are threatening to transform some of the world’s temperate forests, a new study published in Science has found. Without informed management, some forests could convert to shrublands or grasslands within the coming decades.

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