Geology
biochemistry
The great oxygenation event
Oxygen only started accumulating in the atmosphere 2.5 billion years ago
Cover
… and South America emerged
Huge blocks of rock from different ages and origins formed the continent
Cover
The magnetic history of Brazil
Magnetic field in South America is weakening, analysis points out
Memory
A single land
Reinhard Maack found evidence of the origin of continents in Brazil 85 years ago
Mineralogy
The past in grains of sand
Radioactive material allows to track the geological origin of the beaches
Geology
Islands in the Savannah
"Blotches" in the cerrado emerged in ancient riverbeds in the Amazon
Geology
Where mountains were born
Microscopic cracks in crystals help reconstruct the history of the Bocaina
Earth Science
The last piece of Gondwana
Ancient ocean that isolated the Amazon dried up 520 million years ago
Geology
Hitching a ride in steam
Interaction of water with rocks facilitated the formation of amethysts
Geophysics
When humans make the earth quake
Water wells cause dozens of earthquakes a day in São Paulo State
Memory
Evil upon the Earth
Modern seismology resulted from the big 1755 earthquake that destroyed Lisbon
Geology
Jarau mysteries
Meteorite fall formed range of hills in the western part of Rio Grande do Sul
Astronomy
Inhospitable land
Planet outside the Solar System has a rocky surface and extreme temperatures
geology
Vision of the depths
Brazilian team makes a map of the seabed close to the Brazilian coastline
Geology
Ten tremors a day
Study reveals intense movement of the crust in the central region of Brazil