Maria Guimarães

Obituary

Film personality Jean-Claude Bernardet dies at 88

Researcher, actor, and writer leaves a far-reaching legacy in critical thinking and the arts

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Chronobiology

A surprising biological clock

Cyanobacteria live for approximately one day but can prepare themselves for seasonal changes

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Public health

Precision for all

Genome information about the Brazilian population could democratize access to personalized treatments and reduce national health care costs

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Genomics

European father, African or Indigenous mother

DNA sequencing of 2,723 Brazilians reveals a violent legacy behind the interracial mixing that shaped the Brazilian people

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Epidemiology

Bacteria that causes leprosy was present in the Americas before the Europeans

Mycobacterium leprae, the main species, was brought over by the Europeans, but M. lepromatosis had already been on the continent for at least 1,000 years

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Interview

Regina Macedo: Biologist reformulates view on bird behavior

São Paulo native from UnB who helped revise concepts about sexual selection in the tropics and cooperative breeding has dedicated herself to another passion since last year: painting

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Public health

Genome diversity could help SUS

Brazil’s national health system (SUS) could treat diseases more efficiently by making use of databases on ancestry and the wide variety embedded in Brazilian DNA

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Genomics

Brazilians are even more mixed-race than you think

New DNA sequencing of 2,723 people reveals greater Indigenous and African ancestry and highlights violence that marked the formation of the Brazilian population

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Interview

Christiane Taubira: An Amazonian with global reach

After serving as a member of parliament and minister in France, the French-Guyanese economist is preparing to contribute to COP30 with a study on the diversity of local populations

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interview

Suzana Nunes: Female chemical engineer lives in Saudi Arabia

Brazilian scientist develops membranes that act as sophisticated filters, while also working on the permeability of science across genders and countries

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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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INTERVIEW

Ivo Karmann: Geologist of the void

In good humor and with a strong team spirit, researcher tells of the beginnings and evolution of scientific investigations into caves in Brazil

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CHRONOBIOLOGY

Biological clock of cyanobacteria, which live for one day, predicts the arrival of winter

Result surprises scientists, leading them to rethink the mechanisms and evolutionary importance of adjusting to natural rhythms

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ZOOLOGY

Temperature affects sensory system development in trout

Temperature affects sensory system development in trout

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Environment

Belo Monte Dam and drought cause the Volta Grande do Xingu region to dry up

Monitoring indicates that low water flow is preventing fish from reproducing and impeding the way of life of Indigenous people and riverside communities

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Interview

Antoinette WinklerPrins: From the Amazon to research funding

Deputy division director of the US National Science Foundation was in São Paulo to discuss potential collaborations with Brazilians

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Climate change

Bacteria in Amazon tree trunks are capable of absorbing methane

Study by international group indicates that the phenomenon occurs in non-flooded areas

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PHYSIOLOGY

When soccer meets science

Research on recent World Cups begins to bridge the gap between sports and science

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Cover

Travel itinerary

The Tumucumaque Mountains National Park (PNMT) is isolated from urban areas, leaving the forest unaltered by human activity

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ARCHAEOGENETICS

Did diseases kill the Neanderthals?

Sequences detected in the genome of the extinct species represent the oldest documented human viral infections

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Interview

Eliza Freire: Lizards, snakes, and prejudice

In spaces once occupied exclusively by men, Eliza Freire identified new species and uncovered new knowledge of the diversity of reptiles in Northeast Brazil

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Zoology

The explosive evolution of snakes

A combination of genetic, ecological, and morphological data reveals the secrets of success behind these legless reptiles

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Zoology

Wildcats from the Andes and Central America differ to those found in Brazil

Complex that includes Leopardus tigrinus and L. guttulus gains new species, L. pardinoides, all in danger of extinction

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Cover

Travel itinerary

The Tumucumaque Mountains National Park (PNMT) is isolated from urban areas, leaving the forest unaltered by human activity

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Cover

Amazonian Giants

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

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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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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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Ecology

Parasites that turn spiders into zombies

Infected by fungi, invertebrates climb higher to die

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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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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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