Researchers at Stanford University have found a way to move muscles with pulses of light, reports Technology Review's Erika Jonietz. The study, published in Nature Medicine, describes what the researchers are calling "optogenetics" — a technology which uses light-sensitive proteins from a single-celled alga placed on the nerve and pulses of light to trigger muscle movement, Jonietz says.

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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.