Nature is the international weekly journal of science: a magazine style journal that publishes full-length research papers in all disciplines of science, as well as News and Views, reviews, news, features, commentaries, web focuses and more, covering all branches of science and how science impacts upon all aspects of society and life.
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Against discrimination

Nature 548, 7667 (2017). doi:10.1038/548259b

Science cannot and should not be used to justify prejudice.

Opioid emergency, climate language and a frozen fruit cake

Nature 548, 7667 (2017).

The week in science: 11–17 August 2017.

California’s scientists push to create massive climate-research programme

Nature 548, 7667 (2017).

Author: Jeff Tollefson

Effort backed by the state’s flagship universities comes as US President Donald Trump shrugs off global warming.

China launches brain-imaging factory

Nature 548, 7667 (2017).

Author: David Cyranoski

Hub aims to make industrial-scale high-resolution brain mapping a standard tool for neuroscience

China’s embrace of embryo selection raises thorny questions

Nature 548, 7667 (2017).

Author: David Cyranoski

Fertility centres are making a massive push to increase preimplantation genetic diagnosis in a bid to eradicate certain diseases.

Revitalize the world’s countryside

Nature 548, 7667 (2017). doi:10.1038/548275a

Authors: Yansui Liu & Yuheng Li

A rural revival is needed to counter urbanization across the globe, say Yansui Liu and Yuheng Li.

Seismology: Quake news from America

Nature 548, 7667 (2017). doi:10.1038/548278a

Author: Roger Bilham

Roger Bilham savours two rich accounts of seismicity across the continent.

Books in brief

Nature 548, 7667 (2017). doi:10.1038/548279a

Author: Barbara Kiser

Barbara Kiser reviews five of the week's best science picks.

Data sharing: guard the privacy of donors

Nature 548, 7667 (2017). doi:10.1038/548281a

Author: Shirley Y. Hill

I endorse Emma Kowal and colleagues' call for more-responsible sharing of people's research data (Nature546, 474;10.1038/546474a2017). The reuse of data without participants' consent is a serious ethical problem and could discourage participation in future projects (see, for example,

Data sharing: do scientists know best?

Nature 548, 7667 (2017). doi:10.1038/548281b

Authors: David Lambert, Craig Millar & Eske Willerslev

Emma Kowal and colleagues argue against restricting access to genomic data collected from indigenous peoples (Nature546, 474;10.1038/546474a2017), citing our study of Aboriginal Australians as a case in point (A.-S.Malaspinaset al. Nature538, 207

Climate adaptation: Past US floods give lessons in retreat

Nature 548, 7667 (2017). doi:10.1038/548281c

Author: A. R. Siders

The movement of people and infrastructure out of vulnerable areas, a process called managed retreat, is gaining recognition as a potential adaptation strategy to climate change and natural hazards (see also M.Hinoet al. Nature Clim. Change7, 364–370;

Carbon emissions: More nuclear power can speed CO2 cuts

Nature 548, 7667 (2017). doi:10.1038/548281d

Author: Richard Rhodes

Christiana Figueres and colleagues note that turning around global carbon dioxide emissions by 2020 may not be feasible through renewable energy alone (Nature546, 593–595;10.1038/546593a2017). Low-carbon nuclear power will be needed as well.Historically, energy transitions take

History: Ingenious solutions sparked by a crisis

Nature 548, 7667 (2017). doi:10.1038/548281e

Author: Biswa Prasun Chatterji

Researchers have taken to recycling laboratory helium in the face of dwindling supplies resulting from the blockade of Qatar (Nature547, 16;10.1038/547016a2017). Such extreme situations have also prompted other scientists to devise imaginative alternatives in the past.In the

Student immigration: The gamble of going abroad

Nature 548, 7667 (2017). doi:10.1038/nj7667-361a

Author: Virginia Gewin

Political concerns and visa access are swaying students deciding where to pursue a degree.

Trade talk: Crime buster

Nature 548, 7667 (2017). doi:10.1038/nj7667-363a

Author: Julie Gould

A molecular biologist uses his investigative skills to support detectives.

First date with the Hive

Nature 548, 7667 (2017). doi:10.1038/548366a

Author: Gretchen Tessmer

Mind how you go.

Astronomy: A turbulent stellar atmosphere in full view

Nature 548, 7667 (2017). doi:10.1038/548288a

Authors: Gail H. Schaefer

The dynamic motion of gas in the outer atmosphere of a red supergiant star has been mapped, providing clues to the mysterious mechanism that causes massive stars to lose mass through stellar winds. See Letter p.310

Ram-pressure feeding of supermassive black holes

Nature 548, 7667 (2017). doi:10.1038/nature23462

Authors: Bianca M. Poggianti, Yara L. Jaffé, Alessia Moretti, Marco Gullieuszik, Mario Radovich, Stephanie Tonnesen, Jacopo Fritz, Daniela Bettoni, Benedetta Vulcani, Giovanni Fasano, Callum Bellhouse, George Hau & Alessandro Omizzolo

When a supermassive black hole at the centre of a galaxy accretes matter, it gives rise to a highly energetic phenomenon: an active galactic nucleus. Numerous physical processes have been proposed to account for the funnelling of gas towards the galactic centre to feed the black hole. There are also several physical processes that can remove gas from a galaxy, one of which is ram-pressure stripping by the hot gas that fills the space between galaxies in galaxy clusters. Here we report that six out of a sample of seven ‘jellyfish’ galaxies—galaxies with long ‘tentacles’ of material that extend for dozens of kiloparsecs beyond the galactic disks—host an active nucleus, and two of them also have galactic-scale ionization cones. The high incidence of nuclear activity among heavily stripped jellyfish galaxies may be due to ram pressure causing gas to flow towards the centre and triggering the activity, or to an enhancement of the stripping caused by energy injection from the active nucleus, or both. Our analysis of the galactic position and velocity relative to the cluster strongly supports the first hypothesis, and puts forward ram pressure as another possible mechanism for feeding the central supermassive black hole with gas.

Vigorous atmospheric motion in the red supergiant star Antares

Nature 548, 7667 (2017). doi:10.1038/nature23445

Authors: K. Ohnaka, G. Weigelt & K.-H. Hofmann

Red supergiant stars represent a late stage of the evolution of stars more massive than about nine solar masses, in which they develop complex, multi-component atmospheres. Bright spots have been detected in the atmosphere of red supergiants using interferometric imaging. Above the photosphere of a red supergiant, the molecular outer atmosphere extends up to about two stellar radii. Furthermore, the hot chromosphere (5,000 to 8,000 kelvin) and cool gas (less than 3,500 kelvin) of a red supergiant coexist at about three stellar radii. The dynamics of such complex atmospheres has been probed by ultraviolet and optical spectroscopy. The most direct approach, however, is to measure the velocity of gas at each position over the image of stars as in observations of the Sun. Here we report the mapping of the velocity field over the surface and atmosphere of the nearby red supergiant Antares. The two-dimensional velocity field map obtained from our near-infrared spectro-interferometric imaging reveals vigorous upwelling and downdrafting motions of several huge gas clumps at velocities ranging from about −20 to +20 kilometres per second in the atmosphere, which extends out to about 1.7 stellar radii. Convection alone cannot explain the observed turbulent motions and atmospheric extension, suggesting that an unidentified process is operating in the extended atmosphere.

A little democracy could go a long way

Nature 548, 7667 (2017).

Author: Ehsan Masood

The Middle East is freezing out Qatar. A science academy could help — and would set an important precedent for the region, says Ehsan Masood.


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