Geology

Space mission

Evidence of ancient rivers on Mars

New images from Perseverance show signs of what might have been a river on Mars

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Geology

Agency takes responsibility for failed risk assessment

Agency admits failure to communicate volcanic risk to helicopter pilots

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ECOLOGY

Vestiges of the sea in the Amazon interior

Fossils of marine microorganisms indicate that Caribbean waters inundated the Solimões basin at least 11 times over the last 23 million years

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Geology

Mountains and volcanoes in the interior of Ceará

Mineral analysis used to reconstruct the landscape and movements of large blocks of rocks in the region around 600 million years ago

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OBITUARY

A naturalist among geologists

Setembrino Petri showed how microfossils can retell the history of natural landscapes

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Geophysics

The undersea volcano that shook an island

Undersea volcano caused hundreds of earthquakes, frightening the population of Mayotte island

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Environment

Urban planning failures, heavy rainfall, and fragile soil aggravate gullies nationwide

Researchers have warned for years that without adequate soil drainage and occupation, chasms like those in Buriticupu, Maranhão, would grow

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Retrospect

Portrait of the rocks that shape the country

First geological map made solely by Brazilians, in 1940, conveys the country's effort to find oil

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Archaeology

Pre-historic site may harbor the first araucaria pine record in rock art

Cave painting at a prehistoric site in the interior of Paraná would be the first record of the species in rock art

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Geophysics

Earth’s core slowing down

Earth's inner core appears to be slowing down, which could cause subtle changes in the magnetic field that protects the planet

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photolab

Caves born from the sea

Stromatolites, created by microbial activity, provide evidence of maritime activity in caves that are now far inland

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Geology

In the depths of Iceland

Volcanologist identifies pattern after observing the eruption of Fagradalsfjall volcano for 50 days

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PALEONTOLOGY

Myanmar fossils in foreign hands

Publication figures indicate that paleontologists took advantage of armed conflicts in Myanmar to gain access to fossils preserved in amber

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Geophysics

Earthquakes in the sky

Atmospheric balloons at altitude of 20 kilometers detect earthquake in Indonesia

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GEOLOGY

The Tonga megatsunami

Tonga tsunami in January may have been amplified by acoustic-gravity waves

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Botanics

Farming with lunar soil

Plants cultivated in lunar soil grow slower and show more signs of stress than those grown in volcanic ash from Earth

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Paleontology

São Paulo was once covered by forest

São Paulo Metropolitan Area was once covered by vast forest of araucaria trees between 180,000 and 135,000 years ago

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GEOLOGY

Oldest rocks in South America found in Bahia

3.65-billion-year-old material found in the Chapada Diamantina region

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BIOGEOGRAPHY

Water from the Amazon River separates Brazilian and Caribbean marine species

A sediment plume from the river penetrates thousands of kilometers into the Atlantic, home to its own fauna that differs to other regions of the ocean

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GEOLOGY

Rising Andes in Patagonia

The Andes Mountain Range has been rising faster in Patagonia than in other regions

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GEOLOGY

Computer simulations attempt to explain the origin of the Serra do Mar and Mantiqueira mountain ranges

A study by geophysicists from UNESP suggests the mountain ranges were formed by local processes, not influenced by the Andes

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Geology

The São Francisco sands

The Xique-Xique dunes in Bahia were formed by sand carried from the São Francisco River by the wind over the last 100,00 years

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Geochemistry

Witnesses to a primitive Earth

Rocks found in Minas Gerais contain evidence of pockets of oxygen from 400 million years before the gas accumulated in the planet’s atmosphere

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Geophysics

Improving tsunami warnings

The magnetic field produced by a tsunami could be detected before sea levels rise

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Geology

Atmospheric lakes over the Indian Ocean

A meteorologist has identified a new atmospheric phenomenon over the Indian Ocean

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Geophysics

Shifting sands

Studies suggest crescent-shaped dunes can move and interact in five different ways

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GEOLOGY

A very special diamond

A diamond contains a mineral that has never been seen before

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Geology

Exoplanets with exotic rocks

The rocky planets orbiting stars outside our Solar System may have a very different chemical composition to Earth

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Video

Why do dunes grow?

Experiments suggest that crescent-shaped dunes can move and interact in five different ways | 5'35

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Cosmology

Super-impact on Titan

Collision with celestial body may have created an environment on Saturn's largest moon in which primitive life could emerge

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