This Week in Cell

A group of Princeton University and Caltech researchers write in Cell that small RNAs are involved in quorum-sensing pathways. The researchers found that the small RNA Qrr3 relies on four different mechanisms to influence its targets. For instance, it uses catalytic degradation to repress luxR, while using coupled degradation and sequestration to repress luxM and luxO, respectively. And it activates aphA by revealing the ribosome-binding site.

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

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

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.