This Week in PLOS

A team from Germany and Denmark explores gene flow patterns in common ash (Fraxinus excelsior) plants growing in an isolated and fragmented German forest. As they explain in PLOS One, the researchers considered more than a dozen microsatellite markers in leaf, bud, and/or embryo tissue from trees documented as male, female, or hermaphrodite.

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In Science this week: a CRISPR screen identifies sideroflexin 1 as a requisite component of one-carbon metabolism, and more.

Though many details have yet to be worked out, the draft deal for the UK's withdrawal from the EU is giving researchers some hints for what they can expect, Nature News says.

DNA testing has solved a 100-year-old mystery contained in the skull and teeth samples of a now-extinct monkey that once inhabited Jamaica, Gizmodo reports.

As the UN ponders a ban on gene drives, one malaria researcher says there are less dramatic ways to fight the disease in Africa than unleashing GM mosquitoes on a whole continent.