Science

Neurology

Study identifies rare form of Alzheimer’s acquired through treatment no longer used

Individuals were given a hormone extracted from cadavers, contaminated with protein fragments associated with the onset of the disease

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Immunology

Mechanism that keeps the immune response in check also aggravates malaria

The protozoan that causes the disease multiplies freely when certain immune cells are taken out of the fight

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Interview

2024 could become the year with the highest number of dengue cases

FAMERP virologist Maurício Nogueira discusses the characteristics of the current epidemic and the need for the health system to prepare for more patients

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Physics

Study reduces uncertainty about excess magnetism in muons

Study reduces uncertainty about excess magnetism in muons

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Paleontology

The injured paw of a saber-toothed tiger

Fossil with signs of infection indicates that the animal, which lived around 100,000 years ago, probably struggled to move and hunt

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Archaeology

Digital map reveals rock art in São Paulo

Cutting-edge technology used to unite data about sites with prehistoric paintings and engravings in the state in an interactive format

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Ecology

Theodoro, Soneca, and other jaguars in the forests of São Paulo

Guide identifies 51 jaguars, mostly in the far west and south of the state

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Interview

Tasso Azevedo: Deforestation frontiers

Head of MapBiomas explains why deforestation declined in the Amazon in 2023, but increased in the Cerrado

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Environment

The silent drama of the Pampas

In the past four decades, 30% of the biome’s native vegetation has been occupied by soybean cultivation and even by planted eucalyptus forests

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Meteorology

2023 was the hottest year on the planet since 1850

The global average temperature was 14.98 °C, almost 1.5 °C higher than in the preindustrial period

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Health economics

Half of all tuberculosis patients spend more than 20% of their annual family income on treatment

Extra consultations or exams, transportation, food, and loss of income add up to US$1,573.40, on average

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Epidemiology

Around 400,000 people died due to cardiovascular problems in Brazil in 2022

Heart attacks and different types of strokes accounted for 76% of cases

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Pediatrics

Anemia and nutrient deficiencies fall while being overweight increases among children up to 5 years old

A nationwide study also found that ultra-processed foods are consumed at a high frequency

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Cover

Amazonian Giants

Expedition investigates the scientific enigma of 80-meter-tall trees in Amapá

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Astrophysics

Star brightness changes every four years, lighting up part of the surrounding nebula

Cloud of gas and dust is illuminated by the wave phenomenon, known as a light echo

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Immunology

Cutaneous leishmaniasis may be aggravated by viral and bacterial coinfections

Cutaneous leishmaniasis may be aggravated by viral and bacterial coinfections

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Fetal medicine

Digital atlas identifies the ideal evolution of a baby’s brain during pregnancy

3D ultrasounds of the brains of 899 healthy babies were used to map development of the organ from the fourteenth week of pregnancy onwards

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Ecology

Caatinga shrinking

Agriculture has transformed 89% of typical native vegetation in Northeast Brazil

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Meteorology

Artificial intelligence could improve weather forecasting

Artificial intelligence could improve weather forecasting

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Climate change

COP28 acknowledges the role fossil fuels play in global warming, but stops short of banning them

United Nations conference held in Dubai recommends investing in clean and renewable energy sources

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Geosciences

Ground in Maceió has been sinking for 20 years

Salt mines caused tremors and cracks in five neighborhoods in the capital of Alagoas

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Cover

Testing of candidate antibiotics has increased in the last decade

The number of compounds entering clinical use is still too low to combat multidrug-resistant bacteria

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Cover

Antibiotic-resistant bacteria on the rise in Brazilian hospitals

Microorganisms killed at least 33,000 people in the country in 2019

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CLIMATE CHANGE

The green carpet contribution

Moss-covered areas capture 6.43 billion tons of carbon a year and have a coverage area nearly that of China

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GEOLOGY

The long history of the São Francisco river

In the last 90,000 years, the São Francisco river has straightened and deepened under the influence of erosion and dams

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EVOLUTION

The long history of bees

Pollinating insects are estimated to have appeared 120 million years ago on the Western Gondwana supercontinent, formed by what is currently South America and Africa

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EPIDEMIOLOGY

Premature deaths

The suicide rate among indigenous people is almost three times greater than that among the general population

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Medicine

Study determines the route of eggs imported to Brazil

The tortuous path of human eggs exported from Spain to Brazil

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Rehabilitation

Early surgery to correct opening in the roof of the mouth reduces speech problems

Treatment also made it easier for patients to pronounce their first simple syllables

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Climate

Global warming may increase the intensity of extratropical cyclones

The weather phenomenon caused deaths and destruction in southern Brazil in September

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