Highlights

CHEMISTRY

Hydrogel pellets remove water from biodiesel

Reusable material emerges as an alternative for purifying biofuel

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BIOTECHNOLOGY

Scientists develop serum for Africanized bee venom

Scientists develop serum for Africanized bee venom

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GEOLOGY

Extinct rivers of the Northeast

Sedimentary rock layers indicate that waters descended from mountains in the region some 450 million years ago

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PALEONTOLOGY

Biomechanics used to infer how titanosaurs moved

Newly described species lived around 110 million years ago in what may have been the last land bridge between Brazil and Africa

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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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PUBLIC POLICY

Researchers aim to reduce bat deaths at wind farms

Thousands of animals die each year due to collisions or air pressure changes caused by turbine blades

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BOTANY

Orchids emerged in the Northern Hemisphere 83 million years ago

Plant DNA study suggests modern species have diversified in the tropics in the last five million years, especially in Central America

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MENTAL HEALTH

Messages and home visits help reduce symptoms of depression in the elderly

Strategies were tested on low-income participants with low education levels in the city of Guarulhos

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NEUROLOGY

Elderly capuchin monkeys have lesions typical of Alzheimer’s disease

The finding could allow primates abundant in Brazil to be used as a model for studying the human disease

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CLIMATE CHANGE

Lack of maintenance and design flaws prevented the flood containment system from protecting Porto Alegre

Damage could have been significantly reduced if the system, installed 50 years ago, had worked properly

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ENVIRONMENT

Climate change and El Niño increased the frequency and intensity of rainfall in southern Brazil

Global warming doubled the likelihood of extreme precipitation, like the heavy rains of April/May, and increased the volume of rainfall in Rio Grande do Sul from 6% to 9%

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CLIMATE CHANGE

How sponge cities can help prevent flooding

How sponge cities can help prevent flooding

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DATA

How the pandemic affected the HDI

Data show how the pandemic affected HDI

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GOOD PRACTICES

Detours in the labyrinth of Alzheimer’s disease

Author of Nature article cited more than 2,500 times acknowledges image manipulation and requests retraction

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GOOD PRACTICES

Research animal supplier pays record fine for mistreatment of beagles

Research animal supplier pays record fine for mistreatment of beagles

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