The Distance

The Chinese University of Hong Kong's Dennis Lo tells The Observer that, back in 1997 when he and his colleagues published their finding that fetal DNA could be found in the mother's bloodstream, he was astonished that people "didn't realize how far this technology could go. They thought you could use it only to tell the sex of the baby."

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In Science this week: swapping yeast genes with human orthologs to study conservation of function, and more.

Hong Kong is using DNA phenotyping to shame litterers.

A study appearing in Cell suggests some metastatic castration-resistant prostate cancer patients could benefit from PARP inhibitor therapy.

NIH's Francis Collins writes that scientific advances are poised to help populations all over the world, but more scientists are needed to keep the momentum.