Ah, the school science fair — baking soda volcanoes, posters on genetic engineering, tennis-ball models of the solar system. President Obama even held one at the White House last fall, and he's said we should celebrate science fair winners as much as we celebrate sports heroes, "or risk losing the nation's competitive edge," says The New York Times' Amy Harmon.

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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.