This Week in Nature

In Nature this week, a team from Uppsala University presents genetic data suggesting that tooth enamel may have originated in fish. While enamel is unique to vertebrates, fossils and certain primitive species of fish alive today have an enamel-like tissue called ganoine on their scales.

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Five researchers are to share this year's Albany Medical Center Prize for their work on the CRISPR/Cas9 gene-editing tool, the AP reports.

Stat News reports on how white supremacists cope with surprising genetic ancestry testing results.

In Genome Research this week: sex-biased gene expression evolution in malaria mosquitos, method to find ancient selective sweeps, and more.

Iceland has nearly eliminated Down syndrome from its population, CBS News reports.