This Week in Nature

In Nature Chemical Biology this week, a team from the Genome Institute of Singapore reports on the development of a new CRISPR/Cas9 system that can be switched on or off in human cells chemically, enabling rapid and reversible gene editing. The system uses a variant of Cas9 — the enzyme that causes targeted double-strand breaks in CRISPR genome editing — that is activated in with 4-hydroxytamoxifen.

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Labs in the US and South Korea are hoping to bring the woolly mammoth back from beyond extinction, Newsweek writes.

Geneticist Adam Rutherford speaks with National Geographic about paleogenetics, race, and more.

Researchers link genetic links between education and smoking and longevity.

In PNAS this week: influence of gene environment interactions on polygenic traits, epigenetic features affecting fruit fly foraging, and more.