This Week in PNAS

An international team of researchers has traced the origin of Phytophthora infestans, the pathogen behind the Irish potato famine, to central Mexico, rather than to the Andes, where it was previously thought to have originated. By sequencing a set of nuclear genes from P. infestans from Mexico and the South American Andes as well as from sister species, the researchers unraveled the history of this pathogen.

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Researchers describe a way to share data while keeping it secure, Agence France Presse reports.

In Science this week: genetic mutations typically associated with esophageal cancer are common in older, healthy individuals, and more.

India's Council of Scientific and Industrial Research has a new director-general, according to ScienceInsider.

A new study links more than a hundred genes to autism spectrum disorder, Discover's D-brief blog reports.