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Categories: Archaeology: General, Space: The Solar System

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Anthropology: General Archaeology: General Offbeat: Paleontology and Archeology
Published

DNA from archaeological remains shows that immigration to Scandinavia was exceptional during the Viking period      (via sciencedaily.com) 

A new study based on 297 ancient Scandinavian genomes analysed together with the genomic data of 16,638 present day Scandinavians resolve the complex relations between geography, ancestry, and gene flow in Scandinavia -- encompassing the Roman Age, the Viking Age and later periods. A surprising increase of variation during the Viking period indicates that gene flow into Scandinavia was especially intense during this period.

Archaeology: General Biology: Evolutionary
Published

How evolution works      (via sciencedaily.com)     Original source 

What genetic changes are responsible for the evolution of phenotypic traits? This question is not always easy to answer. A newly developed method now makes the search much easier.

Archaeology: General
Published

Mayas utilized market-based economics      (via sciencedaily.com) 

More than 500 years ago in the midwestern Guatemalan highlands, Maya people bought and sold goods with far less oversight from their rulers than many archeologists previously thought. Overtime, the availability of obsidian resources and the prevalence of craftsmen to shape it resulted in a system that is in many ways suggestive of contemporary market-based economies.

Anthropology: General Archaeology: General Geoscience: Geology Paleontology: Climate Paleontology: General
Published

Bering Land Bridge formed surprisingly late during last ice age      (via sciencedaily.com) 

A new study that reconstructs the history of sea level at the Bering Strait shows that the Bering Land Bridge connecting Asia to North America did not emerge until around 35,700 years ago, less than 10,000 years before the height of the last ice age (known as the Last Glacial Maximum). The findings indicate that the growth of the ice sheets -- and the resulting drop in sea level -- occurred surprisingly quickly and much later in the glacial cycle than previous studies had suggested.

Energy: Alternative Fuels Space: The Solar System
Published

The world's largest turbulence simulation unmasks the flow of energy in astrophysical plasmas      (via sciencedaily.com) 

Researchers uncover the long-hidden process that helps explain why the Sun's corona can be vastly hotter than the solar surface that emits it.

Anthropology: Cultures Anthropology: Early Humans Anthropology: General Archaeology: General Paleontology: General
Published

Archaeologists uncover oldest known projectile points in the Americas      (via sciencedaily.com) 

Archaeologists have uncovered projectile points in Idaho that are thousands of years older than any previously found in the Americas, helping to fill in the history of how early humans crafted and used stone weapons.

Space: Exploration Space: The Solar System
Published

Experimentalists: Sorry, no oxygen required to make these minerals on Mars      (via sciencedaily.com) 

When NASA's Mars rovers found manganese oxides in rocks in the Gale and Endeavor craters on Mars in 2014, the discovery sparked some scientists to suggest that the red planet might have once had more oxygen in its atmosphere billions of years ago. But a new experimental study upends this view. Scientists discovered that under Mars-like conditions, manganese oxides can be readily formed without atmospheric oxygen.

Archaeology: General Paleontology: Climate
Published

New theory on timing for human settlement of some parts of tropical Pacific      (via sciencedaily.com) 

Spread across vast distances, the islands of the tropical Pacific Ocean are thought to have been populated by humans in two distinct migrations beginning approximately 3,330 years ago. The first followed a northern route out of what is today the Philippines and the second followed a southern route from Taiwan and New Guinea. People arrived on the islands between these routes -- now making up the Federated States of Micronesia -- about 1,000 years later. But a new finding by sea-level researchers suggests that the islands in Micronesia were possibly settled much earlier than supposed and that voyagers on the two routes may have interacted with one another.

Space: Exploration Space: The Solar System
Published

Ancient asteroid grains provide insight into the evolution of our solar system      (via sciencedaily.com) 

The UK's national synchrotron facility, Diamond Light Source, was used by a large, international collaboration to study grains collected from a near-Earth asteroid to further our understanding of the evolution of our solar system. Researchers brought a fragment of the Ryugu asteroid to Diamond's Nanoprobe beamline I14 where a special technique called X-ray Absorption Near Edge Spectroscopy (XANES) was used to map out the chemical states of the elements within the asteroid material, to examine its composition in fine detail.

Space: Structures and Features Space: The Solar System
Published

Alien planet found spiraling to its doom around an aging star      (via sciencedaily.com) 

The condemned planet could help answer questions about the fate of other worlds as their solar systems evolve.

Space: Exploration Space: The Solar System
Published

Marsquake!      (via sciencedaily.com) 

The quake lasted four hours and identified layering in the crust that could indicate a meteoroid impact. The 4.7 magnitude temblor happened in May 2022 and released five times more energy than any previously recorded quake on Mars. Mapping the seismic activity on Mars will help inform scientists where and how to build structures to ensure the safety of future human explorers.

Space: Structures and Features Space: The Solar System
Published

Astronomers find that two exoplanets may be mostly water      (via sciencedaily.com) 

Astronomers have found evidence that two exoplanets orbiting a red dwarf star are 'water worlds,' planets where water makes up a large fraction of the volume.

Space: Cosmology Space: The Solar System
Published

Exquisite views of distant galaxies      (via sciencedaily.com)     Original source 

For decades, the Hubble Space Telescope provided us with the most spectacular images of galaxies. This all changed when the James Webb Space Telescope (JWST) launched and successfully completed commissioning. For astronomers, the universe is now revealed in a new way never imagined by the telescope's Near-Infrared Camera (NIRCam) instrument.

Anthropology: General Archaeology: General Geoscience: Environmental Issues
Published

Drought encouraged Attila's Huns to attack the Roman empire, tree rings suggest      (via sciencedaily.com) 

Hunnic peoples migrated westward across Eurasia, switched between farming and herding, and became violent raiders in response to severe drought in the Danube frontier provinces of the Roman empire, a new study argues.

Space: Structures and Features Space: The Solar System
Published

ESPRESSO and CARMENES discover two potentially habitable exo-Earths around a star near the sun      (via sciencedaily.com) 

Researchers have discovered the presence of two planets with Earth-like masses in orbit around the star GJ 1002, a red dwarf not far from our solar system. Both planets are in the habitability zone of the star.

Space: The Solar System
Published

VLA and ALMA study Jupiter and Io      (via sciencedaily.com) 

VLA teams up with Juno spacecraft to study Jupiter's atmosphere, and ALMA reveals new details about Io's volcanoes.

Space: Exploration Space: The Solar System
Published

Sound recording made of dust devils (tiny tornadoes of dust, grit) on Mars      (via sciencedaily.com) 

When the rover Perseverance landed on Mars, it was equipped with the first working microphone on the planet's surface. Scientists have used it to make the first-ever audio recording of an extraterrestrial whirlwind.

Archaeology: General Ecology: Endangered Species Offbeat: Paleontology and Archeology Paleontology: Early Mammals and Birds Paleontology: Fossils Paleontology: General
Published

True giant wombat gives Diprotodon podium a wobble      (via sciencedaily.com) 

While the Diprotodon -- the extinct megafauna species that is distantly related to wombats but was the size of a small car -- is commonly (but incorrectly) thought of as Australia's 'giant wombat', researchers have shed light on a large species that does belong in the modern-day wombat family. The complete skull of this true fossil giant wombat, found in a Rockhampton cave in Queensland, Australia and estimated to be around 80,000 years old, has been described for the first time.

Space: Exploration Space: The Solar System
Published

First ultraviolet imaging of Sun's middle corona      (via sciencedaily.com) 

Researchers have discovered web-like plasma structures in the Sun's middle corona. The researchers describe their innovative new observation method, imaging the middled corona in ultraviolet (UV) wavelength. The findings could lead to a better understanding of the solar wind's origins and its interactions with the rest of the solar system.

Space: Exploration Space: The Solar System
Published

Deep-space optical communication demonstration project forges ahead      (via sciencedaily.com) 

Scientists have demonstrated new laser systems for deep-space optical communication.