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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Technology Review reports that 2017 was the year of consumer genetic testing and that it could spur new analysis companies.

A phylogenetic analysis indicates two venomous Australian spiders are more closely related than thought, the International Business Times reports.

In Science this week: CRISPR-based approach for recording cellular events, and more.

A new company says it will analyze customers' genes to find them a suitable date, though Smithsonian magazine says the science behind it might be shaky.