Hurricane Helene lasted only a few days in September 2024, but it altered the landscape of the Southeastern U.S. in profound ways that will affect the hazards local residents face far into the future.
Earth Sciences
Jun 28, 2025
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9
When and where the earliest modern human populations migrated and settled in East Asia is relatively well known. However, how these populations moved between islands on treacherous stretches of sea is still shrouded in mystery.
Archaeology
Jun 25, 2025
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140
New research from the University of California, Davis, the Chinese Academy of Sciences and Texas A&M University reveals that massive emissions, or burps, of carbon dioxide from natural Earth systems led to significant decreases ...
Earth Sciences
Jun 23, 2025
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101
The Earth is rapidly warming, and similar climate upheavals over 300 million years ago once triggered massive fluctuations in marine life.
Earth Sciences
Jun 20, 2025
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139
If our solar system seems stable, it's because our short lifespans make it seem that way. Earth revolves, night follows day, the moon moves through light and shadow, and the sun hangs in the sky. But in reality, everything ...
Planetary Sciences
Jun 18, 2025
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1
A new UC Riverside-led study reveals how common small particles produced by nature as well as human activities can transform upon entering plant cells and weaken plants' ability to turn sunlight into food. The discovery offers ...
Bio & Medicine
Jun 18, 2025
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25
Great apes began to diverge from other primates about 25 million years ago, according to eastern African fossil records. Though it would take another 20 million or so years for upright-walking hominins to appear, understanding ...
Evolution
Jun 12, 2025
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118
The Apollo astronauts didn't know what they'd find when they explored the surface of the moon, but they certainly didn't expect to see drifts of tiny, bright orange glass beads glistening among the otherwise monochrome piles ...
Planetary Sciences
Jun 11, 2025
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105
Earthquakes, volcanic eruptions, shifting tectonic plates—these are all signs that our planet is alive. But what is revealed deep inside Earth surprises laymen and scientists alike: Almost 3000 kilometers below Earth's ...
Earth Sciences
Jun 5, 2025
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66
Mount Etna, the volcano that towers over eastern Sicily, has again captivated the world with a spectacular show, spewing smoke and high into the sky.
Earth Sciences
Jun 3, 2025
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9
A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot, molten rock, ash, and gases to escape from below the surface. Volcanic activity involving the extrusion of rock tends to form mountains or features like mountains over a period of time. The word volcano is derived from the name of Vulcano island off Sicily. In turn, it was named after Vulcan, the Roman god of fire.
Volcanoes are generally found where tectonic plates are diverging or converging. A mid-oceanic ridge, for example the Mid-Atlantic Ridge, has examples of volcanoes caused by divergent tectonic plates pulling apart; the Pacific Ring of Fire has examples of volcanoes caused by convergent tectonic plates coming together. By contrast, volcanoes are usually not created where two tectonic plates slide past one another. Volcanoes can also form where there is stretching and thinning of the Earth's crust (called "non-hotspot intraplate volcanism"), such as in the African Rift Valley, the Wells Gray-Clearwater volcanic field and the Rio Grande Rift in North America and the European Rhine Graben with its Eifel volcanoes.
Volcanoes can be caused by mantle plumes. These so-called hotspots, for example at Hawaii, can occur far from plate boundaries. Hotspot volcanoes are also found elsewhere in the solar system, especially on rocky planets and moons.
This text uses material from Wikipedia, licensed under CC BY-SA
