Ancient Maya cities were dangerously contaminated with mercury

The cities of the ancient Maya in Mesoamerica never fail to impress. But beneath the soil surface, an unexpected danger lurks there: mercury pollution. In a review article in Frontiers in Environmental Science, researchers ...

Recent advances in solid-state NMR studies of zeolite catalysts

Zeolites are important inorganic crystalline microporous materials with a broad range of application in the areas of catalysis, ion exchange, and adsorption/separations. Due to their unique pore structure, high thermal stability ...

Mexican government says train poses no threat to skeleton

Mexico's National Institute of Anthropology and History said Thursday that a prehistoric human skeleton found recently in a flooded cave system along the country's Caribbean coast was actually registered by the institute ...

What ancient dung reveals about Epipaleolithic animal tending

Tiny crystals in ancient animal dung serve as key evidence in a new analysis suggesting the possibility that hunter-gatherers at Abu Hureyra, Syria, may have tended small numbers of animals just outside their dwellings between ...

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