A model quantifies the environmental footprint of wearable health-care electronics and identifies strategies to reduce their environmental toll.

To map the biodiversity of sub-Saharan Africa, 200 specialists in African plants and animals were asked to estimate local species abundances. This approach integrates contextual, place-based knowledge into a multi-scale, comparative biodiversity assessment that can be used to support policy decisions at national, regional and global scales.

Stacking light-generating layers in ‘tandem’ light-emitting diodes (LEDs) can enhance performance, but achieving efficient and stable tandem LEDs made with perovskite materials has remained a challenge. A tandem perovskite-based device that seems to benefit from ‘recycling’ of photons between stacked layers demonstrates highly efficient performance, surpassing the combined emissions of two single-unit devices.

Privacy in the age of computers and a Nature reader questions eyewitness accounts of boomerangs in our weekly dip into the archive.