Science

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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Biology

Butantan tests serum against venemous fish

Institute develops antidote for four species that can cause intense pain in people stung in rivers and the sea

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Interview

Sergio Rezende: A compass to find the way

The physicist and former minister explains what he expects from the debates at the 5th National Science, Technology, and Innovation Conference, which takes place in June 2024

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Interview

Ima Vieira: Restore the forest with justice

Ecologist from Pará says that deforested areas of the Amazon often regenerate, but that the recovery bill must be paid by those who destroyed the forest

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Ethology

Communication and diet different in urban primates

Pied tamarins in Manaus use smell to complement vocalizations, while howler monkeys in Rio Grande do Sul add barbecue to their vegetarian diet

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Ecology

The roots of Amazonian biodiversity

By reversing the flow direction of the rivers, molding the surface, and blocking moisture from the Atlantic, the Andes made the forest a refuge and birthplace for new species of plants and animals

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Zoology

Guide to Amazon snakes launched at the Butantan Institute

Illustrated panels provide information and teach visitors how to recognize 160 species that inhabit the biome

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Cover

Maps show that 14% of the Amazon is occupied by pasture and agriculture

EMBRAPA and INPE restart the TerraClass project, which monitors land use and cover in deforested areas of the biome

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Cover

Forest Guardians

Multiple systems are used to monitor deforestation in the Amazon and guide oversight

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Paleontology

An iberian pterosaur

Lusognathus almadrava is the first species of winged reptile described in Portugal, with Brazilian participation

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Archaeology

Human footprints suggest large population in ancient Amazon

Human footprints suggest large population in ancient Amazon

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Epidemiology

Suicide rate among indigenous people almost three times higher than the general population

Suicide rate among Indigenous people is three times higher than in the general population

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Genetics

Chikungunya virus caused seven outbreaks in Brazil in 10 years

The agent that causes the disease has already been identified in 60% of municipalities

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Ecology

Parasites that turn spiders into zombies

Infected by fungi, invertebrates climb higher to die

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Environment

Plastic rocks

A mixture of minerals, animal remains, and synthetic polymers has emerged as another form of pollution and a threat to the marine environment

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Climate

Droughts worsen in the Cerrado

Rainfall in the Cerrado’s dry season has decreased by up to 50% in the last 30 years

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Nobel Prize

Eleven people received a Nobel Prize in 2023

Four were women, the same number as in 2018 and 2020, only lower than in 2009, when there were five winners

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Physics

Gravity also attracts antimatter

Gravitational force on antiparticles is equal to the force exerted on particles

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Astrophysics

James Webb data challenges cosmology

Telescope observations fuel debate about the formation of galaxies and the speed at which the Universe is expanding

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CONSERVATION

The effects of subsistence hunting in sustainable-use reserves in the Amazon

Impacts on animal populations are greater within five kilometers of human communities

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EVOLUTION

The long history of bees

The 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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ECOLOGY

Orchid uses trick to trap pollinators

Specialized structures guide flies through passages where the insect exchanges pollen between flowers

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