Senator Charles Grassley (R-Iowa) is continuing his investigation into ghostwritten scientific papers and is, as the New York Times reports, "running out of patience." Last week, Grassley sent a letter to then-acting director of the National Institutes of Health, Raynard Kington, asking about NIH's policies regarding ghostwriting and NIH researchers and grantees.

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Two researchers have found that behavioral genetic defenses in criminal cases don't tend to affect outcomes, according to Popular Science.

Researchers report that while host genetics influence the oral microbiome, they don't appear to affect cavity-causing microbes, the Economist says.

Pandas' gut microbiomes change as what they eat changes with the seasons, writes Discover's Inkfish blog.

In PLOS this week: comparative genomic study of malaria-linked macaque parasite, search for apple root reference genes, and more.