The microbial communities in people's mouths are more closely tied to environmental exposures than to genetics, according to a study published online in Genome Research. A University of Colorado, Boulder, team performed 16S ribosomal RNA sequencing on spit samples from more than 100 individuals, each of whom was tested up to three times over the course of a decade. Among the participants were 27 identical- and 18 non-identical twin pairs.

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The London School of Economics' Daniele Fanelli argues at the Proceedings of the National Academy of Sciences that the reproducibility crisis in science isn't as dire as some say.

A team of researchers in Portugal has examined the genomic basis for racing pigeons' athleticism and navigational skills, finding it's likely polygenic.

Wired reports that diagnostic firms continue to seek, post-Theranos, the ability to diagnose diseases from small amounts of blood.

In Science this week: analysis of DNA from ancient North Africans, and more.