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Science News Briefs from around the World

lundi 24 juin 2019 par Jim Daley — The Sciences, Evolution, Physics
A few brief reports about international science and technology from Canada to Kenya, including one about how humans thousands of years ago in what is now Argentina butchered and presumably ate giant... -- Read more on ScientificAmerican.com

The debate over e-cigarettes demands stronger evidence of their value

lundi 24 juin 2019
Nature, Published online: 24 June 2019; doi:10.1038/d41586-019-01785-4Whether the devices help people to quit, or increase health risks, will emerge only from better data.

Star-like cells spark behavioural hyperactivity in mice

lundi 24 juin 2019 par Zhihua Gao, Hailan Hu
Nature, Published online: 24 June 2019; doi:10.1038/d41586-019-01949-2A molecular dialogue between neurons and star-shaped cells called astrocytes in the striatum of the mouse brain leads to behavioural hyperactivity and inattentiveness that are reminiscent of attention-deficit hyperactivity (...)

Daily briefing: Why Switzerland is the best place to lose your wallet

lundi 24 juin 2019 par Flora Graham
Nature, Published online: 24 June 2019; doi:10.1038/d41586-019-01992-zPeople return wallets — especially if there’s money inside (and especially in Switzerland). Plus: Mars rover detects ‘excitingly huge’ methane spike and climate change is undermining the reliability of (...)

Volcano’s magma hit top speed

lundi 24 juin 2019
Nature, Published online: 24 June 2019; doi:10.1038/d41586-019-01980-3Volcanologists might need to update their ideas about how molten rock travels from deep within Earth to erupt at the surface.

Mars rover detects ‘excitingly huge’ methane spike

lundi 24 juin 2019 par Alexandra Witze
Nature, Published online: 24 June 2019; doi:10.1038/d41586-019-01981-2NASA’s Curiosity rover reports the highest-ever reading of the gas at the planet’s surface.

Iranian biologists face US trial for trying to take proteins out of the country

lundi 24 juin 2019 par Michele Catanzaro, Sara Reardon
Nature, Published online: 24 June 2019; doi:10.1038/d41586-019-01901-4At issue is whether growth factors are exempt from export restrictions; a judge will soon decide whether to continue to trial.

The doctor who beat Ebola — and inspires other survivors to care for the sick

lundi 24 juin 2019 par Amy Maxmen
Nature, Published online: 24 June 2019; doi:10.1038/d41586-019-01979-wMaurice Kakule Mutsunga has started a motorcycle ambulance service and is working to dispel rumours about the virus.

Tracking the precession of single nuclear spins by weak measurements

lundi 24 juin 2019 par K. S. Cujia, J. M. Boss, K. Herb, J. Zopes, C. L. Degen
Nature, Published online: 24 June 2019; doi:10.1038/s41586-019-1334-9Periodic weak measurements of just a few carbon-13 nuclear spins in diamond demonstrate sensitive, high-resolution nuclear magnetic resonance spectroscopy at the molecular (...)

Chinese agriculture minister to head UN food agency

lundi 24 juin 2019 par Declan Butler
Nature, Published online: 24 June 2019; doi:10.1038/d41586-019-01991-0Qu Dongyu says that he will prioritize improving farming in tropical and drought-stricken countries.

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