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Hier — 18 septembre 2019Scientific American

C-Section Babies Are Missing Key Microbes

UK study provides the best evidence yet that the way infants are born can alter their microbiomes—but the health effects are unclear

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For illustration purposes only.

How Extreme Weather Threatens People with Disabilities

Those with disabilities can experience more physical impacts and can be more socially isolated than the able-bodied

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Kathlean Wolf stands among native plants on the edge of a stormwater pond in her Madison, Wis., neighborhood.

Don't Trust Scientists? Then Help Collect the Data

Citizen science has the potential to reduce data dishonesty

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California Promises to Fight EPA Plan on Car Standards

The Trump Administration has said it will revoke the state’s ability to set its own air pollution limits

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California Attorney General Xavier Becerra.

Early Butchers Used Small Stone Scalpels

Homo erectus used hand-axes to butcher elephants and other game. But a new study suggests they also used finer, more sophisticated blades. Christopher Intagliata reports.

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Frogs Make Their Homes in Elephant Footprints

The massive herbivores shape the environment for living creatures around them—including some of the smallest animals 

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A Nobel Economist Cites Growth as Innovation

Paul Romer, an expert in what’s known as endogenous growth theory and winner of the 2018 Nobel prize in economics, speaks to Scientific American about seeing economic growth as increased...

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My Brush with Behavioral Economics

Should I sell a musical instrument for triple the price I expected? It all depends

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Deforestation Intensifies Warming in the Amazon Rain Forest

Par : Jim Daley
Slash-and-burn farming may actually harm local crops as a result of increased temperatures

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Aerial view of deforestation in Nascentes da Serra do Cachimbo Biological Reserve in Altamira, Para state, Brazil, in the Amazon basin, on August 28, 2019.
À partir d’avant-hierScientific American

Saturn's Rings May Be Ancient After All

Par : Mike Wall · SPACE.com
Against earlier studies estimating an age of just 100 million years, new research suggests the planet’s rings could be as old as the solar system itself

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The rings of Saturn take center stage in this portrait by the Hubble Space Telescope taken on June 20, 2019.

The Silenced: Meet the Climate Whistle-Blowers Muzzled by the Trump Administration

Six whistleblowers and ex-government scientists describe how the Trump administration made them bury climate science—and why they won’t stay quiet

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Betsy Southerlan, former water quality official at the EPA.

A New Kind of Climate Leadership

Climate change is an opportunity to envision a new world—but in whose image?

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A Newly Identified Protein May Be the Key to Vanquishing the Common Cold

Inactivating this protein in human cells and mice provided immunity to a range of viruses, but an effective treatment is still a long way off

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Human rhinovirus 16 particle illustration.

Hunt for Cause of Vaping Illness Suggests Multiple Mechanisms of Damage

The leading hypothesis for deadly lung problems does not fit with all presentations of the illness

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Vaping devices have been implicated in a strange lung illness that has killed six and sickened hundreds, but the cause of the damage remains elusive.

The Closure of a Historic Hospital Is an Ominous Warning Sign

Hahnemann University Hospital has been serving Philadelphia's poorest residents since 1848; its demise is a harbinger of worse to come

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Floodwaters Diverted from New Orleans Killed Off Marine Life

Water from the swollen Mississippi River fueled algae blooms and reduced salinity in the Gulf of Mexico

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Floodwater from the North Mississippi River at Bonnet Carré Spillway, Norco, Louisiana, USA.

Mapping HIV Prevalence in Sub-Saharan Africa  

Having more localized data on infection rates within countries could help health authorities better target treatment 

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Lab technician putting blood sample on a slide for HIV testing, Johannesburg, Gauteng Province, South Africa.

Microplastics in Fresh Water Are Mostly Laundry Lint

Microplastic particles are everywhere, but in freshwater systems, 60 percent of particles are clothing lint from laundry.

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Pterosaurs Were Monsters of the Mesozoic Skies

Fossils and mathematical modeling are helping to answer long-standing questions about these bizarre animals 

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Introducing the October 2019 Issue

Monsters of the Mesozoic skies, the quest for a room-temperature superconductor and more

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"Dogwood Winter," Meet "Curb Appeal"

Language and America’s relationship with the outdoors

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Marooned: Researchers Will Freeze Their Ship into Arctic Ocean Ice for a Year

Scientists setting sail to the North Pole will become stranded in slowly migrating sea ice to investigate climate change

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The Polarstern research icebreaker casts its shadow across icy waters.

Drilling Could Cause Extinctions in Alaskan Refuge, Government Plan Says

Oil and gas development could exacerbate the impacts to species in the rapidly warming Arctic National Wildlife Refuge

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Arctic National Wildlife Refuge.

Kids Are Not Hurt by Screen Time

A study finds no deleterious effects on mental health when kids spend their leisure time texting and engaging in other online activities.

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Rock Climbing, Climate Science and Leadership

Par : Ben Santer
In situations where lives are at stake, you need to be rigorously honest with yourself and with others—not take out your Sharpie to distort the truth

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Rock Climbing, Climate Science and Leadership

Par : Ben Santer
In situations where lives are at stake, you need to be rigorously honest with yourself and with others—not take out your Sharpie to distort the truth

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Climate Change Is Having Widespread Health Impacts

Children, pregnant people and the elderly are the most at risk from extreme weather and heat—but the impact is already felt across every specialty of medicine

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5G Is Coming: How Worried Should We Be about the Health Risks?

So far, at least, there’s little evidence of danger

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Winston Churchill's Thoughts on Evolution

His essay on alien life was uncovered in 2016; now we have a second example of his previously unpublished thoughts about science

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Apple's Amazing New Screen

Par : Wade Roush
It will revamp our ideas of what a display can do

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