Issue # 349 _ March 2025

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Cover

The environmental impacts of computing
The energy- and water-intensive sector is responsible for 1.7% of atmospheric carbon emissions; a new area of research has emerged to address the problem By
How to make data centers more sustainable
Renewable energy sources and more efficient distribution of computing tasks could reduce the impacts of these facilities By
The high energy demands of the cryptocurrency market
The digital currency industry’s electricity consumption is equivalent to that of an average European country By

 

INTEGRITY

Use of fake email addresses leads to retraction of 45 articles by Brazilian scientists

Peer review was compromised: three reviewers suggested by the authors were not who they appeared to be

By

ETHICS

Online science communicators discuss limits for advertising campaigns

Capable of reaching millions of people on social media, they have been asked to advertise products, services, and institutional videos for companies

By

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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IMMUNOLOGY

Genetic analysis and autopsies reveal how yellow fever progresses

The virus disrupts the immune system response, which becomes ineffective and inefficient

By

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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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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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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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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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

By

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

By

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

By

AUTOMOTIVE ENGINEERING

Trucks and buses operate without drivers

Autonomous navigation system developed by Vitória-based startup allows vehicles to identify obstacles and travel on predefined routes

By

AGRONOMY

Drone radar facilitates agricultural monitoring

Device created by São Paulo–based startup also performs soil analysis and is capable of locating mineral deposits, anthills, and bones buried underground

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SOCIETY

How urban changes are redefining amateur soccer

Recreational sport is changing in response to the growth of cities and lack of space to play

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LINGUISTICS

Abdias Nascimento, a supporter of the antiracist movement, combined art and politics

He was at the forefront of initiatives such as the Teatro Experimental do Negro, founded 80 years ago

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LINGUISTICS

Proper names, such as those of people and places, inspire studies in onomastics

Interdisciplinary field touches on knowledge ranging from law to psychology

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