Pick a leader with vision for the Food and Agriculture Organization p.275

The United Nations body is about to elect a new director‑general. The choice will affect the entire globe for years to come.

doi: 10.1038/d41586-019-01902-3

World Health Organization resists declaring Ebola emergency — for third time p.283

Outbreak worsens in the Democratic Republic of the Congo as virus spreads into Uganda.

doi: 10.1038/d41586-019-01893-1

Africa’s science academy leads push for ethical data use p.284

The goal is to create the continent’s first cross-disciplinary guidelines for collecting, storing and sharing data and specimens.

doi: 10.1038/d41586-019-01894-0

Whole-body PET scanner produces 3D images in seconds p.285

The modified scanner also requires less radioactive exposure, vastly broadening its applications.

doi: 10.1038/d41586-019-01833-z

Caterpillar’s devastating march across China spurs hunt for native predator p.286

Scientists hope that insects such as stink bugs could keep the fall armyworm in check.

doi: 10.1038/d41586-019-01867-3

What universities can learn from one of science’s biggest frauds p.287

Detailed analysis of misconduct investigations into huge research fraud suggests institutional probes aren’t rigorous enough.

doi: 10.1038/d41586-019-01884-2

The secret social lives of viruses p.290

doi: 10.1038/d41586-019-01880-6

CRISPR babies: when will the world be ready? p.293

doi: 10.1038/d41586-019-01906-z

Sunlight harvested by nanotubes p.310

doi: 10.1038/d41586-019-01767-6

Sex chromosomes manipulate mate choice p.311

Female mate choice in some species selects for traits that are harmful to males. A hypothesis to explain how such mating preferences might evolve puts the spotlight on sex chromosomes.

doi: 10.1038/d41586-019-01714-5

Crazy colour printing without ink p.312

doi: 10.1038/d41586-019-01856-6

Enzymes that detoxify marine toxins p.315

Potent microbial toxins found in shellfish are possible starting points for drug discovery, but analogues are needed for biological testing. Toxin-modification enzymes now suggest a new approach for producing these analogues.

doi: 10.1038/d41586-019-01742-1

A licence to kill during inflammation p.316

Inflammasomes are protein complexes that fight infection by driving inflammation or cell death. It now seems that the protein NEK7 provides a ‘licence’ for the formation of inflammasomes containing the protein NLRP3.

doi: 10.1038/d41586-019-01764-9

Antarctic offshore polynyas linked to Southern Hemisphere climate anomalies p.319

doi: 10.1038/s41586-019-1294-0

Atypical behaviour and connectivity in SHANK3-mutant macaques p.326

doi: 10.1038/s41586-019-1278-0

Single-cell transcriptomic analysis of Alzheimer’s disease p.332

doi: 10.1038/s41586-019-1195-2

Structural mechanism for NEK7-licensed activation of NLRP3 inflammasome p.338

doi: 10.1038/s41586-019-1295-z

Perfect Andreev reflection due to the Klein paradox in a topological superconducting state p.344

doi: 10.1038/s41586-019-1305-1

Enhanced intrinsic photovoltaic effect in tungsten disulfide nanotubes p.349

doi: 10.1038/s41586-019-1303-3

Chiral twisted van der Waals nanowires p.354

doi: 10.1038/s41586-019-1147-x

Helical van der Waals crystals with discretized Eshelby twist p.358

doi: 10.1038/s41586-019-1308-y

Structural colour using organized microfibrillation in glassy polymer films p.363

doi: 10.1038/s41586-019-1299-8

Turbulent convective length scale in planetary cores p.368

doi: 10.1038/s41586-019-1301-5

Global change drives modern plankton communities away from the pre-industrial state p.372

doi: 10.1038/s41586-019-1230-3

Mating preferences of selfish sex chromosomes p.376

doi: 10.1038/s41586-019-1271-7

Mitochondrial fragmentation drives selective removal of deleterious mtDNA in the germline p.380

doi: 10.1038/s41586-019-1213-4

Genome-wide cell-free DNA fragmentation in patients with cancer p.385

doi: 10.1038/s41586-019-1272-6

De novo protein design by citizen scientists p.390

doi: 10.1038/s41586-019-1274-4

Heterochromatin drives compartmentalization of inverted and conventional nuclei p.395

doi: 10.1038/s41586-019-1275-3

Late steps in bacterial translation initiation visualized using time-resolved cryo-EM p.400

doi: 10.1038/s41586-019-1249-5