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Emory University scientists have developed mammalian cells that produce magnetic nanoparticles to aid medical researchers in tracking cells, reports MIT's Tech Review. The scientists took a gene from pond bacteria that use small magnetic particles as a sort of compass and inserted it into mouse cells which then produced their own magnetic nanoparticles. When those mouse cells were inserted into a live mouse's brain, the cells could easily be seen on an MRI.

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23andMe has a holiday popup shop at a mall and could open additional stores, Bloomberg reports.

By studying koalas and a retrovirus that infects them, researchers may have uncovered a new sort of 'immune response' that occurs at the genomic level, Agence France Presse reports.

NPR reports that the first person in the US given a gene editing-based therapy for a genetic disorder is heading home.

In Science this week: ancient genomes reveal social inequality within individual households, new method for quantifying genetic variation in gene dosage, and more.