US universities are right to fight injustice p.491

When the Trump administration threatened to deport international students taking only-online courses, there was only one response. No.

doi: 10.1038/d41586-020-02143-5

Rosalind Franklin was so much more than the ‘wronged heroine’ of DNA p.492

One hundred years after her birth, it’s time to reassess the legacy of a pioneering chemist and X-ray crystallographer.

doi: 10.1038/d41586-020-02144-4

Arab world’s first Mars probe takes to the skies p.499

Celebration is tinged with relief as US$200-million orbiter embarks on 7-month odyssey to the red planet.

doi: 10.1038/d41586-020-02170-2

Mystery over Universe’s expansion deepens with fresh data p.500

A long-awaited map of the Big Bang’s afterglow fails to settle a debate over how fast the Universe is expanding.

doi: 10.1038/d41586-020-02126-6

Row over Africa’s largest dam in danger of escalating, warn scientists p.501

Ethiopia wants to start filling the Grand Ethiopian Renaissance Dam this summer. Egypt calls it an ‘existential threat’.

doi: 10.1038/d41586-020-02124-8

Pandemic speeds largest test yet of universal basic income p.502

Economists welcome the chance to see whether giving people cash to spend however they choose improves livelihoods.

doi: 10.1038/d41586-020-01993-3

The mathematical strategy that could transform coronavirus testing p.504

Four charts show how pooling samples from many people can save time or resources.

doi: 10.1038/d41586-020-02053-6

The explosion of new coronavirus tests that could help to end the pandemic p.506

doi: 10.1038/d41586-020-02140-8

Mounting evidence suggests coronavirus is airborne — but health advice has not caught up p.510

doi: 10.1038/d41586-020-02058-1

Mitochondrial genome editing gets precise p.521

A bacterial toxin has been found that allows DNA in a cellular organelle called the mitochondrion to be precisely altered. This development could help to combat diseases caused by mutations in mitochondrial DNA.

doi: 10.1038/d41586-020-01974-6

Five centuries of human observation reveal Europe’s flood history p.522

doi: 10.1038/d41586-020-02138-2

Native South Americans were early inhabitants of Polynesia p.524

DNA analysis of Polynesians and Native South Americans has revealed an ancient genetic signature that resolves a long-running debate over Polynesian origins and early contacts between the two populations.

doi: 10.1038/d41586-020-01983-5

How lactate links cannabis to social behaviour p.526

An active component of cannabis has been shown to disrupt the delicate metabolic balance between neurons and non-neuronal cells called astrocytes, altering social behaviour in mice.

doi: 10.1038/d41586-020-01975-5

Measurement of the time spent by a tunnelling atom within the barrier region p.529

doi: 10.1038/s41586-020-2490-7

Quantum-limit Chern topological magnetism in TbMn₆Sn₆ p.533

doi: 10.1038/s41586-020-2482-7

Imaging viscous flow of the Dirac fluid in graphene p.537

doi: 10.1038/s41586-020-2507-2

Cleavable comonomers enable degradable, recyclable thermoset plastics p.542

doi: 10.1038/s41586-020-2495-2

Desymmetrization of difluoromethylene groups by C–F bond activation p.548

doi: 10.1038/s41586-020-2399-1

Ice retreat in Wilkes Basin of East Antarctica during a warm interglacial p.554

doi: 10.1038/s41586-020-2484-5

Current European flood-rich period exceptional compared with past 500 years p.560

doi: 10.1038/s41586-020-2478-3

Antarctica’s wilderness fails to capture continent’s biodiversity p.567

doi: 10.1038/s41586-020-2506-3

Native American gene flow into Polynesia predating Easter Island settlement p.572

doi: 10.1038/s41586-020-2487-2

Six reference-quality genomes reveal evolution of bat adaptations p.578

doi: 10.1038/s41586-020-2486-3

Single-cell lineage tracing unveils a role for TCF15 in haematopoiesis p.585

doi: 10.1038/s41586-020-2503-6

A single-cell transcriptomic atlas characterizes ageing tissues in the mouse p.590

doi: 10.1038/s41586-020-2496-1

Ageing hallmarks exhibit organ-specific temporal signatures p.596

doi: 10.1038/s41586-020-2499-y

Glucose metabolism links astroglial mitochondria to cannabinoid effects p.603

doi: 10.1038/s41586-020-2470-y

IL-18BP is a secreted immune checkpoint and barrier to IL-18 immunotherapy p.609

doi: 10.1038/s41586-020-2422-6

IGF1R is an entry receptor for respiratory syncytial virus p.615

doi: 10.1038/s41586-020-2369-7

Fasting-mimicking diet and hormone therapy induce breast cancer regression p.620

doi: 10.1038/s41586-020-2502-7

N⁶-methyladenine in DNA antagonizes SATB1 in early development p.625

doi: 10.1038/s41586-020-2500-9

A bacterial cytidine deaminase toxin enables CRISPR-free mitochondrial base editing p.631

doi: 10.1038/s41586-020-2477-4

Dynamic RNA acetylation revealed by quantitative cross-evolutionary mapping p.638

doi: 10.1038/s41586-020-2418-2