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Nutrition

The only country self-sufficient in food

Guyana is the only country in the world that produces enough basic food to sustain its own population

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Geology

Climbing rocks receive little attention

Around 80% of climbing sites lack signage, environmental management, and visitor guidelines

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Zoology

White-tailed deer populations recover

US deer population grew from 300,000 to 35 million after hunting declined in the twentieth century

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Innovation

Fixing cracks in concrete with lichen

Lichens mixed into concrete repair cracks

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Letter from the editor | 353

Doing the accounts

Cattle farming alone is responsible for almost 20% of greenhouse gas (GHG) emissions in Brazil. If the rest of the agricultural sector is included, the figure rises to 30.5%. If changes in land use—such as the conversion of forest areas into fields, pastures, and crops, all of which are closely associated with agriculture and livestock—are... View Article

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Astrophysics

The Gas Giant was once bigger

Jupiter rapidly doubled in volume soon after the formation of the Solar System

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FAPESP

New scientific coordinator at Pesquisa FAPESP

Luiz Britto named new scientific coordinator of Pesquisa FAPESP

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Xenotransplantation

First two pig kidney transplants

First two people to receive genetically modified pig kidneys die

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Paleontology

X-ray of an ancient organism

X-ray analysis shows that the first animals with skeletons, which lived 55 million years ago, were elongated and tubular

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Acknowledgment

Vahan Agopyan given title of professor emeritus at USP

Vahan Agopyan awarded title of professor emeritus at USP

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Education

The effects of cyberbullying

All forms of cyberbullying can cause trauma, according to a study of teenagers aged 13 to 17 years old

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Paleontology

The Brazilian cradle of dinosaurs

New ancient dinosaur discovered in Rio Grande do Sul

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Photolab

Parasitized egg

Photograph awarded by CNPq shows a mosquito egg colonized by a fungus

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Research itineraries

Computer scientist diagnosed with autism seeks new connections with AI

André Ponce de Leon Ferreira de Carvalho from USP develops tools to facilitate the detection of autism

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Retrospect

RadamBrasil project celebrates 50 years

Radar mapping has uncovered natural riches, trained hundreds of specialists, and is used in research on relief, geology, soils, climate, and vegetation

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Obituary

Taking Brazilian science worldwide

Mathematician Jacob Palis, former director of IMPA, transformed the institute into a globally renowned research center

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Obituary

A strategist in Science

José Israel Vargas was an expert in nuclear energy, a chemist, a physicist, and Brazil’s longest serving minister of science and technology

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Music

Rare sheet music helps tell the story of music in Brazil

Documents found in archives reveal works by composers such as Presciliano Silva, one of the first Black teachers in São Paulo

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Society

Backyards strengthen community ties in poor regions of São Paulo

Study investigates the role of these outdoor spaces on the lives of residents

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Anthropology

Impact of the digital age on the sex market

Websites expand the scope of sex work and deepen inequalities among the people offering this type of service

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Space engineering

Satellite designed to locate people lost at sea

Nanodevice created at a university is designed to help rescue small boats in emergency situations

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Sustainability

Research center and company create method for recycling LED lamps

Method based on physical processing of material could reduce waste generation and stimulate circular economy

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Biotechnology

Bacterial cellulose membranes help wounds heal

Brazilian universities and companies are advancing with new applications for biomaterials made from plant waste

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Innovation

How to avoid failures in radical innovation projects

How to avoid failures in radical innovation projects

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Interview

José Roque: Physicist talks about the Sirius accelerator and Brazil’s first maximum biosafety level laboratory

Director-General of the Brazilian Center for Research in Energy and Materials (CNPEM) won the 2025 Admiral Álvaro Alberto Award

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Astrophysics

Simulation suggests that Mercury formed from a glancing collision with a body of similar mass

Impact would have ripped away part of the planet's mass and shaped its current geological composition

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Agriculture

Farming technique of the Wauja people in Alto Xingu increases cassava diversity

Wauja agriculture can help recover crops that have suffered from genetic erosion

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Paleoecology

The Atlantic Forest in layers

Research on microalgae in southern São Paulo reveals how an old lake transformed into a swamp

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Data

São Paulo is Brazil’s main hub for knowledge-intensive activities

São Paulo remains Brazil’s main hub for knowledge-intensive activities

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Good practices

Scientific journals under heavy fire

American newspapers suffer budget cuts and threats from the federal government

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