The rise of the eco-tourist has led to the Galápagos Islands being added to UNESCO's danger list, reports the New York Times. Between 1990 and 2006, the number of visitors to the archipelago rose 250 percent. The Galápagos now has 748 introduced plant species -- as compared to 500 native ones --  that the Darwin Foundation says could have "severe impacts [on] native biodiversity."

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The UK's Nuffield Council on Bioethics says genetically modifying human embryos could be morally permissible, according to the Guardian.

A new Nature Biotechnology paper reports that CRISPR-Cas9 gene editing can lead to large deletions or complex rearrangements that could be pathogenic.

The Wall Street Journal likens a prototype developed by Synthetic Genomics to a "biological fax machine."

In PNAS this week: strategy for reactivating Rett syndrome-linked MECP2, small molecules able to suppress Staphylococcus aureus virulence, and more.