Highlights

Physical chemistry 

The periodic table at a crossroads

After 150 years, the diagram that arranges the chemical elements based on their similar properties faces difficulties for further growth

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INTERVIEW

Peter Goddard: The risks of knowledge

British physicist Peter Goddard, former director of the Institute for Advanced Study at Princeton, says innovative research must be unpredictable

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Heritage

Inside the ruins of the National Museum

Five months after the fire, a visit to the rubble shows what remains of São Cristóvão Palace

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Evolution

The origin of the butterfly

Studies based on gene and fossil analysis estimate that butterflies emerged between 120 and 100 million years ago

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Public health

Emotions weigh heavy on the heart

A study of 15,000 people in Brazil indicates an association between psychiatric problems and cardiovascular diseases

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Physiology

An enemy unknown

Brazilian researchers find that fasting causes growth hormone to activate neurons that induce hunger and undermine weight loss

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Affirmative action

Medals worth a spot at university

UNICAMP welcomes first students admitted on science competition performance without admission exams

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Publications

Reaction to Plan S

Consultation receives more than 600 suggestions on how open-access strategy could be changed

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Communication

Open mics for science

Podcasts gain audiences and open new avenues for science communication throughout Brazil

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Interview

Francisco de Assis Costa: The multiple faces of the Amazon

Economist points out the diversity of productive structures and the role of peasants dating back to the eighteenth century

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Cover

Sources of inspiration

Higher education in Brazil incorporates different approaches from around the world

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Cover

A complex machine

Sustained by taxation, educational funding systems like FUNDEB, which will end in 2020, represent a new challenge for the federal government

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Biodiversity

Number of large animals continues to fall

The number of large wild animals on the planet is decreasing as a result of various human activities,

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Innovation

2019 Péter Murányi Prize Winners

The Péter Murányi Foundation awarded its top prize for 2019 to the SOS Chuva mobile app

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Opportunity

The death of the Opportunity Mars rover

One of NASA's longest and most successful interplanetary exploration missions ended after nearly 15 years of service

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