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Categories: Anthropology: Cultures, Geoscience: Volcanoes

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Geoscience: Volcanoes
Published

Risk of volcano catastrophe 'a roll of the dice', say experts      (via sciencedaily.com) 

While funding is pumped into preventing low-probability scenarios such as asteroid collision, the far more likely threat of a large volcanic eruption is close to ignored -- despite much that could be done to reduce the risks, say researchers.

Anthropology: Cultures
Published

Wood sharpens stone: Boomerangs used to retouch lithic tools      (via sciencedaily.com) 

A new study into the multipurpose uses of boomerangs has highlighted the hardwood objects were used to shape the edges of stone tools used by Australian Indigenous communities.  The research demonstrated how boomerangs could function as lithic (or stone) tool retouchers by investigating the use-wear generated on the boomerangs' surfaces during retouching activities. It was found that these use-wear impacts on boomerangs comparable to those observed on Paleolithic bone retouching tools, which date back to more than 200,000 years ago.

Geoscience: Volcanoes
Published

Volcanic super eruptions are millions of years in the making -- followed by swift surge      (via sciencedaily.com) 

Researchers have discovered that super-eruptions occur when huge accumulations of magma deep in the Earth's crust, formed over millions of years, move rapidly to the surface disrupting pre-existing rock.

Geoscience: Volcanoes
Published

Cloud study demystifies impact of aerosols      (via sciencedaily.com) 

Aerosol particles in the atmosphere have a bigger impact on cloud cover -- but less effect on cloud brightness -- than previously thought, new research shows.

Anthropology: Cultures Anthropology: Early Humans
Published

Taking your time makes a difference      (via sciencedaily.com) 

Researchers find that stem cells in the developing brain of modern humans take longer to divide and make fewer errors when distributing their chromosomes to their daughter cells, compared to those of Neanderthals.

Anthropology: Cultures Archaeology: General
Published

High-status Danish Vikings wore exotic beaver furs      (via sciencedaily.com) 

Beaver fur was a symbol of wealth and an important trade item in 10th Century Denmark, according to a new study.

Geoscience: Volcanoes
Published

New method can improve explosion detection      (via sciencedaily.com) 

Computers can be trained to better detect distant nuclear detonations, chemical blasts and volcano eruptions by learning from artificial explosion signals, according to a new method.

Anthropology: Cultures Anthropology: Early Humans Archaeology: General
Published

DNA from ancient population in Southern China suggests Native Americans' East Asian roots      (via sciencedaily.com) 

For the first time, researchers successfully sequenced the genome of ancient human fossils from the Late Pleistocene in southern China. The data suggests that the mysterious hominin belonged to an extinct maternal branch of modern humans that might have contributed to the origin of Native Americans.

Geoscience: Earthquakes Geoscience: Volcanoes
Published

Shockwave caused by Tonga underwater eruption may help scientists predict future tsunami      (via sciencedaily.com) 

Using data from the eruption of the underwater volcano near Tonga in 2022, researchers used disturbances in Earth's upper atmosphere to track the airwaves that cause tsunami. Their findings may lead to speedier predictions of these giant waves.

Geoscience: Volcanoes
Published

Fiber optic sensing detects tremor from Icelandic subglacial volcano      (via sciencedaily.com) 

Researchers used a fiber optic cable on the ice cap of an Icelandic subglacial volcano to detect low-frequency volcanic tremor, suggesting this technology could be useful in monitoring other ice-covered volcano systems.

Geoscience: Volcanoes
Published

Volcano's eruption will help scientists plot weather, climate      (via sciencedaily.com) 

As it captivated people around the world, the January eruption of the Hunga Tonga-Hunga Ha'apai volcano gave scientists a once-in-a-lifetime chance to study how the atmosphere works, unlocking keys to better predict the weather and changing climate.

Anthropology: Cultures Anthropology: Early Humans
Published

New genetic research on remote Pacific islands yields surprising findings on world's earliest seafarers      (via sciencedaily.com) 

New genetic research from remote islands in the Pacific offers fresh insights into the ancestry and culture of the world's earliest seafarers, including family structure, social customs, and the ancestral populations of the people living there today.

Geoscience: Volcanoes
Published

Tonga volcano eruption among the most powerful ever observed, triggering atmospheric gravity waves that reached the edge of space      (via sciencedaily.com) 

The eruption of the Hunga Tonga-Hunga Ha'apai submarine volcano in January 2022 was one of the most explosive volcanic events of the modern era, a new study has confirmed.

Geoscience: Volcanoes
Published

Iceland volcano eruption opens a rare window into the Earth beneath our feet      (via sciencedaily.com) 

The recent Fagradalsfjall eruption in the southwest of Iceland has enthralled the whole world, including nature lovers and scientists alike. The eruption was especially important as it provided geologists with a unique opportunity to study magmas that were accumulated in a deep crustal magma reservoir but ultimately derived from the Earth's mantle (below 20 km).

Anthropology: Cultures Anthropology: Early Humans Archaeology: General
Published

The heat is on: Traces of fire uncovered dating back at least 800,000 years      (via sciencedaily.com)     Original source 

Scientists reveal an advanced, innovative method that they have developed and used to detect nonvisual traces of fire dating back at least 800,000 years -- one of the earliest known pieces of evidence for the use of fire. The newly developed technique may provide a push toward a more scientific, data-driven type of archaeology, but -- perhaps more importantly -- it could help us better understand the origins of the human story, our most basic traditions and our experimental and innovative nature.

Anthropology: Cultures
Published

Developmental dyslexia essential to human adaptive success      (via sciencedaily.com)     Original source 

Researchers say people with developmental dyslexia have specific strengths relating to exploring the unknown that have contributed to the successful adaptation and survival of our species.

Geoscience: Volcanoes
Published

Scientists provide explanation for exceptional Tonga tsunami      (via sciencedaily.com) 

Scientists say they have identified the exact mechanism responsible for the exceptional tsunami that spread quickly across the world after the colossal eruption of the Tonga volcano earlier this year.

Geoscience: Volcanoes
Published

Great timing, supercomputer upgrade lead to successful forecast of volcanic eruption      (via sciencedaily.com) 

In the fall of 2017, a team of geologists had just set up a new volcanic forecasting modeling program on the Blue Waters and iForge supercomputers. Simultaneously, another team was monitoring activity at the Sierra Negra volcano in the Galapagos Islands, Ecuador. The teams shared their insights and what happened next was the fortuitous forecast of the June 2018 Sierra Negra eruption five months before it occurred.

Geoscience: Volcanoes
Published

The weird musical dynamics of a lava lake on Kilauea volcano      (via sciencedaily.com) 

Before its big burst in 2018, Kilauea spent ten years erupting more gently. Research gives new insights into the volcano's longstanding lava lake, one feature of this eruption.

Geoscience: Volcanoes
Published

Validation brings new predictive capability to global megafire smoke impacts      (via sciencedaily.com) 

New research modeling smoke from two recent megafires sets the stage for better forecasting of how emissions from these global-scale events will behave and impact temperatures. As huge wildfires become more common under climate change, increased attention has focused on the intensity and duration of their emissions, which rival those of some volcano eruptions.