Science

Heritage

Relevant rocks

Scientists identify 36 areas in Brazil with highly diverse geological structures and natural landscapes

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Biology

Rainforest marsupials

Study suggests opossums emerged in the Amazon about 40 million years ago

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Atmosphere

Greatest threat to global health

Editorial published in more than 200 medical journals highlights the risks of ignoring climate change

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Atmosphere

Pollution that causes global cooling

Aerosol particles that worsen air quality and damage human health also reduce global warming by a third

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Physics/Chemistry

Free passage through the skin

Simulations indicate that applying an electric field stimulates the formation of "blisters" that turn the epidermis into a gateway for drugs to enter the body

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Physiology

A vein under pressure

Following transplantation to the heart in surgeries to treat coronary artery disease, saphenous veins undergo drastic restructuring and can become clogged

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Soil science

Tracking crime

Soil sample analysis can aid investigations and help solve crimes

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Cover

Boosted atmosphere

Studies indicate that almost 80% of 405 recent extreme events were more frequent or intense due to changes caused by humans

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Cover

Climate in the Anthropocene

Human activity is driving global warming and amplifying extreme droughts and rainfall, says the IPCC

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Covid-19

Delta advances

Delta variant threatening control of the COVID-19 pandemic

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Molecular biology

Urban germs

Thirty-one of the same bacteria are found in cities on all continents

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Oceanography

The Saga of the Paratethys

The world's largest lake formed 12 million years ago and then disappeared, giving rise to the Caspian and Black Seas

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Genetics

Refuge under threat

Loss of native vegetation in the Amazon, home to nearly half of the world's jaguars, is putting the species at risk

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Environment

The Amazon is losing gas

Studies indicate that the east of the rainforest, which has suffered greater deforestation, has become a source of carbon dioxide in the last decade, while the west is trying to remain a carbon sink.

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Interview

Sérgio Pena: Under the skin

The Minas Gerais geneticist proves that, at the cellular level, Brazilians look the same

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COVID-19

Mixed protection

Preliminary studies suggest that combining two different vaccines could be useful in the fight against the pandemic

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Medicine

Breathing microplastics

Tiny and potentially harmful polymer particles and fibers found in human lungs

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NEUROSCIENCE

A statistical brain

Experiment involving structured sequences of sounds and silences corroborates long-held conjecture that the brain uses probabilistic models to anticipate events

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ASTROPHYSICS

Star fossil

New survey of celestial bodies finds rare and ancient star over 10 billion years old

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COVID-19

Warning from the deep

Monitoring the novel coronavirus in sewage systems improves epidemiological surveillance in Brazilian cities

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COVID-19

Vaccines in the real world

CoronaVac and Covishield effectiveness tested in Serrana and Botucatu, two towns in the state of São Paulo

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ENVIRONMENT

Less forest, more agriculture

South America loses natural vegetation while livestock and crops gain ground over the last three and a half decades

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Physics

The muon enigma

Two recent experiments reveal anomalous behavior in these mysterious particles that, if confirmed, could lead to a revision of the dominant theory of matter

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Health

The first bonding

Instructional home visits by nurses help teen mothers bond with their babies and contribute to child development

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COVID-19

Focus on the genome

Brazil is still behind in monitoring Sars-CoV-2 genetics, but an injection of funding for research networks and the acquisition of materials could improve the situation

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Environment

Fighting global warming

US academies of science propose a research program to study the feasibility of Earth cooling measures

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Climate change

Risk of more natural disasters

Global warming may lead to more flash floods and landslides caused by extreme rainfall in the South, Southeast, and Northeast of Brazil

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Biology

The colors and songs of evolution

Varying plumage hues and song patterns lead to the formation of new species in certain bird groups

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Genetics

Family ties

Roughly 46,000 years ago, modern human beings ventured into the heart of Europe and interbred with Neanderthals

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COVID-19

All eyes on ButanVac

New vaccine candidate uses a more stable version of the spike protein

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