Science

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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Environment

Hidden losses

The size of the Atlantic Forest has remained almost stable for 30 years, but old forest is losing ground to newer formations with lower biodiversity and carbon stock

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Photonics

New light conversion

Miniaturization on a microchip that transforms a type of electromagnetic radiation into two distinct frequencies could reduce the size of laser devices

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Materials engineering

Made to order

Artificial intelligence system determines glass formulation based on the desired characteristics

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Physics

Twisted graphene

Brazilian device records surprising effect of misaligned graphene sheets

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COVID-19

New vaccines on the way

Butantan Institute and federal government plan to start human trials of two vaccine candidates in the coming months

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COVID-19

The evolution of a virus

Low vaccination rates and lack of control over SARS-CoV-2 circulation is increasing the likelihood that more transmissible and lethal variants will emerge

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Ecology

Lowered immunity

Even modest doses of insecticide make bees more susceptible to bacterial infections and increased mortality

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Mathematics

A web of algorithms

Mathematical model simulates how spiders capture vibrations to locate trapped prey

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Physics

Nuclear fusion prefers a 2D world

The chance of hydrogen atoms fusing and generating energy is one billion times greater in two-dimensional systems

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