This Week in Science

In this week's Science, a researcher from Stony Brook University discusses how residual genetic material found in the ocean — so-called environmental DNA (eDNA) — can be used to study hard-to-find marine animals. While current methods rely on capturing or visually identifying the animals, eDNA can be obtained from skin cells, scales, secretions, and other tissues that remain in waters for weeks.

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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.

In Nature this week: an improved reference genome of the Aedes aegypti mosquito, genomes of four species of truffles, and more.