This Week in Science

In Science this week, an international research team publishes genetic analyses of fish to identify how the animals adapt to pollutants. They analyzed the genomes of 384 killfish, some of which have developed tolerances to environmental toxins, across four regions. Fish that can tolerate the pollution were found have reduced genetic diversity compared to sensitive fish — pointing to a reduction in population size at polluted sites.

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Five researchers are to share this year's Albany Medical Center Prize for their work on the CRISPR/Cas9 gene-editing tool, the AP reports.

Stat News reports on how white supremacists cope with surprising genetic ancestry testing results.

In Genome Research this week: sex-biased gene expression evolution in malaria mosquitos, method to find ancient selective sweeps, and more.

Iceland has nearly eliminated Down syndrome from its population, CBS News reports.