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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Researchers hope to tease out the signature effects that different carcinogens leave on the genome to determine their contributions to disease, Mosaic reports.

The Wall Street Journal looks into the cost of new gene therapies.

An Imperial College London-led team reports that it was able to use a gene drive to control a population of lab mosquitos.

In PNAS this week: genomic effects of silver fox domestication, limited effect of mitochondrial mutations on aging in fruit flies, and more.