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The contribution of outdoor air pollution sources to premature mortality on a global scale
Investigation of premature mortality by seven emission sources of atmospheric pollutants shows that outdoor air pollution, mostly by fine particulate matter, leads to more than three million premature deaths per year worldwide, which could double by…
Genetic evidence for two founding populations of the Americas
Previous genetic studies have suggested that the Americas were peopled by a single founding population of Eurasian origin, but a genome-wide study of 30 Native American groups shows that Amazonian Native Americans also have a second source of…
Massive migration from the steppe was a source for Indo-European languages in Europe
A genome-wide analysis of 69 ancient Europeans reveals the history of population migrations around the time that Indo-European languages arose in Europe, when there was a large migration into Europe from the Eurasian steppe in the east (providing a…
Defining the Anthropocene
Time is divided by geologists according to marked shifts in Earth’s state. Recent global environmental changes suggest that Earth may have entered a new human-dominated geological epoch, the Anthropocene. Here we review the historical genesis of the…
