Science

ASTROPHYSICS

Two dwarf satellite galaxies discovered near the Milky Way

Aquarius III and Leo VI each have less than 5,000 stars, a very low number for this type of formation

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interview

Suzana Nunes: Female chemical engineer lives in Saudi Arabia

Brazilian scientist develops membranes that act as sophisticated filters, while also working on the permeability of science across genders and countries

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ASTROPHYSICS

Giant atoms could be the basis for more refined quantum sensors

Controlling the so-called Rydberg state is the key to producing this type of structure

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ASTROPHYSICS

Hotter dry season reduces survival rate of Amazonian birds by 63%

Impact of 1 °C increase in average temperature was observed on 29 species living in a preserved area of the rainforest

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ORNITHOLOGY

Hotter dry season reduces survival rate of Amazonian birds by 63%

Impact of 1 °C increase in average temperature was observed on 29 species living in a preserved area of the rainforest

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EVOLUTION

The ultra-black wasps of the Caatinga

Newly identified species exhibit rare evolutionary mechanism that allows them to maintain a body temperature lower than the surrounding environment

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BIOENERGY

Enzyme from bacteria in the soil may increase productivity of second-generation ethanol

Microorganism protein breaks down cellulose in sugarcane bagasse into smaller sugar, which ferments more easily

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ARCHAEOLOGY

The Amazon’s ancient cornfields

Archaeological sites in Bolivia reveal traces of large-scale corn farming that once sustained a dense human population—and may have even played a role in domesticating ducks

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PHYSIOLOGY

Study seeks to explain why Alzheimer’s is more common in women

Levels of molecules linked to energy production and gene activation control are lower in females with varying degrees of dementia

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IMMUNOLOGY

Genetic analysis and autopsies reveal how yellow fever progresses

Genetic analysis and autopsies reveal how yellow fever progresses

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EPIDEMIOLOGY

Antimicrobial-resistant bacteria could kill 39 million people by 2050

Almost 10% of deaths are expected to occur in Latin America and the Caribbean

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PHYSICS

Disorder in state of matter generates new type of superconductor

Disorder in state of matter generates new type of superconductor

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ECOLOGY

Rodents in the Pantanal use holes dug by armadillos as temporary shelter

Other animals, such as ocelots and foxes, were observed approaching the dens but not entering

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ZOOLOGY

GPS mapping reveals the role of forests in jaguar conservation

Study included 54 jaguars fitted with tracking collars in 12 locations across South America

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CHRONOBIOLOGY

Biological clock of cyanobacteria, which live for one day, predicts the arrival of winter

Result surprises scientists, leading them to rethink the mechanisms and evolutionary importance of adjusting to natural rhythms

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PUBLIC HEALTH

Sexual violence against boys grew at a rate of 6.8% per year between 2013 and 2022

39,900 cases were reported in the period; two of every three occurred at the victim's home

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GEOSCIENCES

Map exposes oldest structures in South America

Tomography techniques redefine boundaries of rock structures formed billions of years ago

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ENVIRONMENT

Artificial intelligence identifies areas most vulnerable to landslides

Study compares the effectiveness of five machine-learning models at predicting this type of disaster in São Sebastião

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PHYSIOLOGY

Cold and heat killed 142,700 people in Brazilian cities from 1997 to 2018

Cold and heat killed 142,700 people in Brazilian cities from 1997 to 2018

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CLIMATE CHANGE

2024 was the first year with global warming above 1.5 °C

All continents broke their average temperature record except for Oceania and Antarctica

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interview

Maria Amélia Veras: A keen eye for disparities

Dr. Maria Amélia Veras investigates the living conditions of transgender and homosexual individuals, alongside viral factors, to curb the spread of sexually transmitted infections

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THERMODYNAMICS

Cold beer for longer

Tall, narrow-based glass with trumpet mouth keeps the beverage cooler during consumption

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ATMOSPHERIC CHEMISTRY

Gas in the Amazon rainforest accelerates cloud formation

Trees emit isoprene, which reacts with other molecules and increases the production of cloud condensation nuclei 100-fold

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INTERVIEW

Anacláudia Rossbach: The quest for more resilient cities

Brazilian director of United Nations program says cities play an important role in the process of adapting to and mitigating climate change

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ZOOLOGY

Temperature affects sensory system development in trout

Temperature affects sensory system development in trout

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BOTANY

Plants use pollen bombs to compete for space on hummingbird beaks

Success in competition between male gametes can increase chance of reproduction

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ENVIRONMENT

Aquifer depletion threatens forests and rivers

Over-exploitation and climate change are damaging environments that depend on underground water reserves

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ECOLOGY

Drought and wildfires reduce forest biodiversity

Although the populations of some plant and animal species are able to recover when rains return, the effects of drought and wildfires can last years

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interview

“If left untreated, bipolar disorder is a progressive disease,” says psychiatrist Flávio Kapczinski

UFRGS researcher is part of an international group defining the progressive stages of the disorder and is leading a survey of mental illnesses in Brazil

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PUBLIC HEALTH

Program that empowers pregnant women to make choices reduces unnecessary cesareans

Created 10 years ago, Parto Certificado prevented more than 20,000 surgical births between 2014 and 2019

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