Geology

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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Video

The search for life on one of Saturn’s moons

Asteroid collision may have created favorable conditions to the appearance of primitive life forms on Titan | 4'10

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Heritage

Relevant rocks

Scientists identify 36 areas in Brazil with highly diverse geological structures and natural landscapes

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Biology

Rainforest marsupials

Study suggests opossums emerged in the Amazon about 40 million years ago

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Geology

Waiting for a ride

After an unsuccessful attempt in August, NASA’s Mars rover Perseverance collected two samples of Martian rock in early September

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Soil science

Tracking crime

Soil sample analysis can aid investigations and help solve crimes

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geography

Sea level controls volcano activity

The sea level may control the activity of many volcanoes on the planet

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Photolab

Marble columns

As groundwater flows through the limestone substrate, it dissolves the rock in underground systems called karsts

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Video

A speck of dirt to solve a crime?

Soil sample analysis can aid investigations and help solve crimes | 4'31

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Oceanography

The Saga of the Paratethys

The world's largest lake formed 12 million years ago and then disappeared, giving rise to the Caspian and Black Seas

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hydrology

Half of the world’s rivers dry up each year

More than half of the world's rivers and streams have a stretch that dries up for at least one day each year

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Video

A weak spot on Earth’s magnetic field hovers over Brazil

Learn how the planet's invisible shield works, and what is the South Atlantic Anomaly | 3'34

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Geology

In the depths of a geyser

For the first time, geoscientists from the University of Utah and Yellowstone National Park, USA, have mapped the interior of the world's most powerful geyser

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Geology

Coastal mountains moving

Subject to constant erosion, they are slowly advancing inland, and within a few million years could form a vast coastal plain

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Geology

Gas from an ancient sea

Methane released by a saline lake may have caused a rise in temperature leading to the diversification of life forms on the planet

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