Volume 597 Issue 7876



News Features

News & Views

Triple-decker layered perovskite materials p.333

Layered perovskites are useful materials that contain sheets of a perovskite semiconductor enclosed by organic molecules. Crystals of layered perovskites that include sheets of a second inorganic lattice can now be grown from solution.

doi: 10.1038/d41586-021-02433-6

Mutation fingerprints encode cellular histories p.334

Cells continually acquire mutations and pass them on to their progeny. The mutation profiles of human cells shine a light on the cells’ developmental history and their dynamics in adult tissue.

doi: 10.1038/d41586-021-02269-0

Text-message nudges encourage COVID vaccination p.336

A field trial shows that text-message ‘nudges’ encourage people to get vaccinated against COVID-19. To be effective, nudge approaches such as this must combine three aspects: they must prompt, enable and motivate behaviour.

doi: 10.1038/d41586-021-02043-2

Traces of a series of human dispersals through Arabia p.338

The Arabian Peninsula was a key migratory crossroads when humans and our hominin relatives began to leave Africa. Archaeological evidence and climate reconstructions reveal episodes when early humans inhabited Arabia.

doi: 10.1038/d41586-021-02321-z