At the NY Times Freakonomics blog, economist Steven Levitt goes through the math behind the FBI's DNA match probabilities. Recently, an Arizona state crime lab analyst found two unrelated men who matched at nine of 13 loci -- the FBI estimates the odds of such a match to be one in 113 billion.

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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.