Science

GENETICS

Avian flu virus spreading across Brazil came from the coast of Chile or Peru

Pathogen obtained from a dead bird in Espírito Santo is genetically similar to the one circulating in the two neighboring South American countries

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BIOLOGY

Yellow fever virus has been circulating uninterrupted in southern Brazil for seven years

The disease vector arrived in the country’s southeast two to three years earlier than previously thought

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COVID-19

Nonpharmaceutical interventions helped reduce the impact of COVID-19

Nonpharmaceutical interventions helped reduce the impact of COVID-19

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PHYSICS

Supposed room-temperature superconductors fail to convince critics

Independent experiments have been unable confirm the claims that, even outside controlled conditions, the materials are capable of transmitting electricity without energy loss

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INTERVIEW

David MacMillan: A catalyst for discoveries

Chemist won the Nobel Prize in 2021 for important innovations in the pharmaceutical industry

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ASTROPHYSICS

Artificial intelligence helps distinguish spiral galaxies from elliptical ones

AI algorithms classify 160,000 groups of billions of stars from images obtained by a Brazilian robotic telescope

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GEOLOGY

Rain, erosion, and dams have shaped the São Francisco river over the last 90,000 years

Previously winding and shallow, the river has straightened and deepened

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ECOLOGY

Humans prey on more species than 19 other large carnivores

Almost 15,000 vertebrates are impacted by human activity through hunting, fishing, or capture for breeding in captivity

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HEALTH

Early puberty

Maternal and paternal heritages play equal role in genetic disorder causing premature onset of puberty

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EPIDEMIOLOGY

Falls in uptake of the MMR vaccine occurred at different rates between 2006 and 2020

The declines were greater in poorer municipalities and more intense during the economic crisis and the beginning of the COVID-19 pandemic

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IMMUNOLOGY

Studies identify actions of immune cells that harm the body during sepsis

Erroneous response by the immune system as a result of an infection affects 420,000 people per year in Brazil and kills 230,000

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Cover

Temperature variations may cause five million deaths per year

The number is equivalent to 9.5% of all global deaths, with 75% of fatal victims living in Asia and Africa

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Cover

Urban heat islands make even small and midsized towns warmer

Temperatures can vary by as much as 10 degrees Celsius between areas covered by concrete and neighborhoods with more vegetation

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Cover

July was the hottest month in recent history and broke temperature records

Global warming shows no signs of letting up, causing forest fires in the Northern Hemisphere’s summer and a mild winter below the Equator

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BIOTECHNOLOGY

Aedes for all

Genetically modified mosquito already on sale in Brazil

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BIOTECHNOLOGY

Transgenic moths on the horizon

New technology developed to combat the main threat to maize crops

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Materials engineering

Glass against cancer

Researchers have developed composite materials with the potential to kill carcinogenic cells and regenerate bone

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BIOFUEL

Liquid enhancement

Applying a single dose of natural compounds to sugarcane crops can boost the production of second-generation ethanol

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ECOLOGY

How many cubs does a jaguar have?

Scientists use technology to measure the birth rate of jaguars in the Pantanal

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BIOLOGY

First expedition to the Imeri Mountains

Researchers have identified animals and plants isolated by altitude, which may help explain the relationships between species from high areas in northern South America

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INTERVIEW

Elisabete Weiderpass: Waiting for a tsunami

Director of the WHO’s International Agency for Research on Cancer warns of an expected increase in cases in the coming decades

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VIROLOGY

Mayaro virus causes swelling of the skin, muscles, and joints

In tests on rodents, the pathogen multiplied quickly and affected other organs

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EPIDEMIOLOGY

Brazilian spotted fever not a threat

Combating the tick-borne disease requires an understanding of its underlying ecology and effective clinical diagnostics

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Physiology

Maternal hormones affect brain areas that control hunger and satiety in the fetus

Studies suggest that metabolism can be programmed from gestation, leading to obesity and diabetes

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GEOLOGY

The future landscape of the northeast and the coastline

There will be more high areas, since the sedimentary basins are rising especially in these regions

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CLIMATE

El Niño has an 80% chance of being moderate to strong

Warming of surface waters in the Tropical Pacific changes rainfall and temperature patterns in Brazil and around the world

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INTERVIEW

Celso Grebogi: The chaos tamer

Physicist from Curitiba creates strategies to intervene in complex systems such as the climate and ecological networks

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Cover

The era of whole genome sequencing

New techniques are changing the way genetic material is understood and promising to transform our understanding of diseases, human genetic diversity, food production, and evolutionary processes

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COVER

At least 1.76 million people in Brazil suffer from dementia

The number of cases of the disease is increasing as the population ages and could reach 5.5 million by 2050

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INTERVIEW

Virginia Ciminelli: Mining territories

UFMG hydrometallurgist argues that the benefits of exploiting natural resources should be better shared with local communities

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