Science

GENETICS

Scattered ancestry

Mestizos from Brazil's southern states have more Amerindian DNA lineages than modern-day indigenous groups in the region

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Epidemiology

Health in the balance

Modeling shows that spending cuts in primary care could curb the decline in premature mortality

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Medicine 

Cleaning the blood to treat yellow fever

Experimental plasma exchange therapy reduced mortality to 5% last year in São Paulo (2019)

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Physics

The unexpected power of friction

Brazilian and German scientists explain the unexpected motion of the barrel in the explosive ping-pong ball experiment

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GEOGRAPHY

The dance of the dunes

Researchers collect precise data on the movement of sand dunes in Lençóis Maranhenses

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Oceanography

Revelations from a submerged archipelago

Beaches, rivers, and mangroves covered a mountain range that was above sea level 40 million years ago

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Environment

How to monitor forest fires

Data from NASA and INPE satellites confirm an increased number of fires in the Amazon

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Public health

A diagnosis of medical error

Recent studies survey hospital medical teams' mistakes and show how to overcome them

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Physics

The first images

In its initial test, Sirius, Brazil's newest synchrotron light source, produces microtomographic images of a rock and a heart

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Paleoclimate

Storms in the Ice Age

In the last glacial period, torrential rainfall in what is now Brazil was mostly concentrated in the Northeast and the Amazon

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Climate Change

The Amazon is now a source of CO2

Between 2010 and 2017, the rainforest emitted more carbon than it absorbed

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Molecular biology

Sugarcane mapped

A team coordinated by Brazilian scientists finds over 370,000 genes when sequencing a commercial cultivar of the plant

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Environment

Hidden landscapes in the Pantanal

Researchers find a 1000 km2 lake hidden under aquatic plants on the plains of the Rio Negro

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Ornithology

A comeback in the Atlantic Forest

Alagoas curassows are reintroduced into their habitat 40 years after going extinct in the wild

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Ecology 

A bat in the nest

Cameras catch winged mammals attacking eggs and chicks in bird nests in the Atlantic Forest of São Paulo State

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Environment

Oil spill spreads

Analysis suggests three potential sources of the oil near the Brazilian coast

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Immunology

Battle of the cells

Experimental therapy tested for the first time in Brazil uses a patient's own defense system to fight cancer

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Physics

Cooling with a twist

Cooling systems based on twisting and untwisting fibers can reduce water temperature by 7 °C

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Astronomy

Cosmic pretzel

Image shows system formed of two young stars entwined within discs of gas and dust filaments

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Immunology

Clues about the origin of type 1 diabetes

Changes in intestinal microbiota may be associated with onset of the disease

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Public health

The challenge of diagnosing Zika

There is no scientific consensus that any of the 48 approved laboratory tests can differentiate between Zika and the dengue virus

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Genetics

Jacobina controversy

Authors divided over article on the spread of DNA from transgenic Aedes aegypti mosquitoes used in an experiment in Bahia

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Ecology

Plants that grow on iron

Research finds 38 plant species that exist only in the so-called Amazonian cangas, a type of rupestrian grassland found in the Serra de Carajás area

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Interview

Vera Lucia Imperatriz Fonseca: The vast world of bees

For 20 years, the biologist has defended the role of pollinators in conserving native forests and expanding agricultural production

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Environment

How to monitor forest fires

Data from NASA and INPE satellites confirms increased number of fires in the Amazon

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Microbiology

Bacteria in the ICU

Microbes found on mattresses, medical equipment, and smart devices can survive routine cleaning

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New materials 

New energy applications for gold and platinum

Platinum-coated gold nanoparticles could enhance the efficiency of fuel-cell catalysts

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Physico-chemistry

The hidden strokes of Portinari

Tests show how the artist produced his artwork and may be useful in confirming the author of a piece found in the painter’s former home

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Physics

Fluidity in curved space-time

Study supports theory on how dense matter interacts with strong gravitational fields

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Environment

How forests are reborn

In dry areas, hardwood trees are the first to naturally regenerate, while the reverse scenario occurs in wet forests

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