Guia Covid-19

Geography

Photolab

Ancient dunes

The sand dunes on the banks of the São Francisco River, the most extensive inland dunes in Brazil, began to form more than 20,000 years ago

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Genetics

Where Vikings went

Researchers analyzed the remains of 442 humans found in Viking cemeteries in Scotland, concluding that the Viking identity was not limited to people with Scandinavian genetic ancestry

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COVID-19

Seismographs used to measure social distancing

Due to the social distancing measures adopted to contain the pandemic, seismographs in large cities registered a significant reduction in the waves generated by ground movement

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Technology

A drone that counts trees

Researchers from Brazil and the USA have developed a drone capable of flying autonomously through a forest and mapping the trees

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Record

In space and the deep sea

American geologist, oceanographer and former astronaut Kathy Sullivan, 68, is the first person to walk in space and to dive to the deepest point of the ocean

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Astronomy

High-resolution moon

Researchers have produced the first detailed digital map of the Moon's entire surface

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Geography

Human activity alters river mouths

Amazon River delta is shrinking by 1 km2 per year because of siltation

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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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GEOGRAPHY

The dance of the dunes

Researchers collect precise data on the movement of sand dunes in Lençóis Maranhenses

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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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Geology

Why the Nile is so unchanging

The Nile has followed the same path in North Africa for almost 30 million years

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Environment

Hidden landscapes in the Pantanal

Researchers find a 1000 km2 lake hidden under aquatic plants on the plains of the Rio Negro

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Cover

Growth without destruction

Sustainable development of the Amazon will require changes in traditional agricultural methods and improvements to agroforestry resource extraction

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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

Forestry budgets

Researchers examine why some conservation areas receive more public funding than others

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Archival science

Memories Revealed

The unpublished collections of Celso Furtado and Joaquim Nabuco recently donated to research institutions promise new revelations

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Geography

The dance of the dunes

Researchers collect precise data on the movement of sand dunes in Lençóis Maranhenses

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Photography

Much more than a photographer

A retrospective on Marc Ferrez brings to light his dialogue with science and expands knowledge of his work

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GEOGRAPHY

The young Amazon

Central region of the rainforest may have formed just 45,000 years ago as wetlands receded

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Geography

Boundaries between the Amazon and the Cerrado

In the Brazilian states of Mato Grosso, Pará, Tocantins, and Goiás, some areas classified as Cerrado are, in fact, part of the Amazon

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Geography

The wandering North Pole

The North Magnetic Pole has been moving faster than expected from Canada toward Siberia, Russia, in recent years

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Interview

Alexandre Antonelli: At the forefront of science in royal gardens

In February, Brazilian biologist will take the role of scientific director of Kew Gardens in the United Kingdom

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Ecology

The fragile DNA of sharks

Overfishing could further decrease the naturally low genetic diversity of some commercially valuable species

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Photolab

Pre-Columbian Culture

Fragments of ceramic figures indicate that at the time there was a cultural connection between peoples across South America

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Sociology

Immigrants stimulate the economy in European countries

A study assessing immigration to Europe between 1985 and 2015 has concluded that immigrants have a positive effect on the continent's economy

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GEOSCIENCES

Polarized opinion

Declining strength of Earth's magnetic field fuels debate on the chances of the poles reversing for the first time in 780,000 years

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COVER

More people in the rainforest

New archaeological sites and evidence of plant domestication support the idea that pre-Columbian Amazonia was densely populated

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GEOSCIENCES

Scars of a cataclysm in Central Brazil

Rocks found in the states of Mato Grosso, Goiás, and São Paulo reveal earthquake and tsunami caused by a meteorite some 250 million years ago

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Remote Sensing

Groundwater seen from space

A new satellite system will soon resume collecting aquifer data from around the globe

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ARCHAEOLOGY

Occupation of primordial “Brazil”

Evidence suggests that hunter-gatherers inhabited all major regions of Brazil roughly 10,000 years ago

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