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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A University of California, Los Angeles-led team has found turning off the CCR5 gene could improve recovery after a stroke, according to Scientific American.

South Dakota lawmakers are to weigh a bill aimed at teaching the strengths and weaknesses of scientific concepts, the Associated Press and KEVN-Black Hills Fox report.

In Science this week: the synthetic genetic system hachimoji, and more.

Thermo Fisher Scientific says it will no longer sell machines in China's Xinjiang region, according to the Wall Street Journal.