Black death mortality not as widespread as believed

The black death, which plagued Europe, West Asia and North Africa from 1347 to 1352, is the most infamous pandemic in history. Historians have estimated that up to 50 percent of Europe's population died during the pandemic ...

Sri Lanka lifts ban on weedkiller linked to cancer cases

Sri Lanka on Wednesday lifted its partial ban of a weedkiller subject to US lawsuits over claims it causes cancer, after abandoning a campaign to become the world's first completely organic farming nation.

NASA study traces decade of ammonia air pollution in Africa

A new NASA-led study is the first to document changing atmospheric ammonia (NH3) concentrations in Africa over an extended period. Ammonia is an air pollutant which can lead to heart and lung related illness. When present ...

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