Marcos Pivetta and Rafael Garcia

Environment

How to monitor forest fires

Data from NASA and INPE satellites confirm an increased number of fires in the Amazon

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Climate Change

The Amazon is now a source of CO2

Between 2010 and 2017, the rainforest emitted more carbon than it absorbed

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Ornithology

A comeback in the Atlantic Forest

Alagoas curassows are reintroduced into their habitat 40 years after going extinct in the wild

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Ecology 

A bat in the nest

Cameras catch winged mammals attacking eggs and chicks in bird nests in the Atlantic Forest of São Paulo State

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Physics

Cooling with a twist

Cooling systems based on twisting and untwisting fibers can reduce water temperature by 7 °C

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Cover

Two Amazons

The dry season is getting longer in the southern Amazon, where most deforestation occurs, while the northwest remains wet

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Cover

The rainforest

The Amazon carries water to other regions of Brazil and even other continents

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Environment

How to monitor forest fires

Data from NASA and INPE satellites confirms increased number of fires in the Amazon

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Physics

Fluidity in curved space-time

Study supports theory on how dense matter interacts with strong gravitational fields

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Cover

When light bent

Observations of the 1919 solar eclipse from Brazil and Africa provided the first experimental proof of Albert Einstein’s theory of relativity

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IPCC

Land use and climate change

Humanity uses over 70% of the earth's ice-free land surface, and primary activities account for nearly a quarter of greenhouse gas emissions.

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Archaeology

Homo sapiens in the Peloponnese

A 210,000-year-old skull fragment found in southern Greece may be the oldest evidence of the presence of modern humans outside Africa

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Paleoanthropology

Diaspora 2.5 million years ago

Chipped stone artifacts found in Jordan may be evidence of archaic humans leaving Africa 400,000 years earlier than previously thought

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PHYSICS

Fluidity in curved space-time

Study backs up theory on how dense matter interacts with strong gravitational fields

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Paleontology

A stranger in the Grand Canyon

280-million-year-old fossil footprints from an ancient desert provide first evidence of the presence of vertebrates that in theory had not yet adapted to dry environments

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Interview

Max Langer: How prehistoric life forms are classified

Paleontologist explains what makes a reptile a dinosaur and explains why the origin of these animals is so hotly debated

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Cover

The First Land of the Dinosaurs

Many of the oldest known fossils of these reptiles, which lived 230 million years ago, have been found in the Brazilian state of Rio Grande do Sul, on the border of Argentina

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Interview

José Antonio Marengo Orsini: A time of uncertainty

Climatologist says that society can perceive climate change but has difficulty adopting adaptive measures

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Zoology

The origin of perching birds

A group representing more than 60% of bird species originated in Australia 47 million years ago, study finds

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Zoology

The Alta Floresta titi

A new species of monkey is discovered in northern Mato Grosso State

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INTERVIEW

Daniel Kennefick: The importance of Sobral

An astrophysicist and science historian reports that without the observation of the eclipse in the city of Ceará, the experimental results of 1919 would probably have been inconclusive

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COVER

When light bent

Observation of the 1919 solar eclipse from Brazil and Africa provided the first experimental proof of Albert Einstein’s theory of relativity

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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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Interview

Francis Halzen: In pursuit of neutrinos and cosmic rays

Lead scientist at IceCube observatory comments on the recent discovery of high-energy particles

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Physics

International meeting point

Instituto Principia will bring together researchers from across Brazil and abroad through projects with a maximum duration of six months

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Interview

José Antonio Marengo Orsini: A time of uncertainty

Climatologist says society can perceive climate change but has difficulty adopting adaptive measures

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GEOSCIENCES

The ruins of rare stones

The geology and paleontology collection at the National Museum contained 70,000 pieces, such as meteorites, unique pterosaurs, and mineral specimens from the Portuguese royal family

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INTERVIEW

Niède Guidon: “I’m going to open the Museum of Nature and then I will rest”

After four decades in the Serra da Capivara, the archaeologist confirms that she will leave Piauí after the opening of the new exhibition space

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NATURAL HISTORY

A new window on the sertão

The foundation created by archaeologist Niède Guidon is set to inaugurate its Museum of Nature in December at Serra da Capivara National Park in Piauí

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Archaeology

Prehistory in pieces

The skull of Luzia and a 2,800-year-old Egyptian mummy were among the more than 100,000 items in the archaeology and biological anthropology collections

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