This Week in PLOS

A PLOS One study supports the notion the cognitive ability has a heritable basis that involves variants of small effect in many different genes. Researchers from the University of Minnesota used information at roughly 2.5 million imputed or directly genotyped SNPs for a genome-wide association study of general cognitive ability in 7,100 Caucasian individuals who had been assessed for their cognitive wherewithal using IQ tests adjusted to reflect their age.

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CNN reports that researchers have tied a new variant to opioid addiction risk.

Organoids derived from patients' tumors may help determine what chemotherapy treatment patients would benefit from, according to New Scientist.

An initiative from GenomeAsia 100K hopes to increase the number of South Asians in genetic research, according to NBC News.

In Science this week: genomic analysis of ancient and modern horses indicates population turnover, and more.