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Categories: Anthropology: General, Physics: Quantum Physics

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Offbeat: General Offbeat: Space Physics: General Physics: Quantum Computing Physics: Quantum Physics Space: Astrophysics Space: General Space: Structures and Features
Published

New theory unites Einstein's gravity with quantum mechanics      (via sciencedaily.com)     Original source 

The prevailing assumption has been that Einstein's theory of gravity must be modified, or 'quantized', in order to fit within quantum theory. This is the approach of two leading candidates for a quantum theory of gravity, string theory and loop quantum gravity. But a new theory challenges that consensus and takes an alternative approach by suggesting that spacetime may be classical -- that is, not governed by quantum theory at all. 

Chemistry: Biochemistry Energy: Technology Engineering: Nanotechnology Physics: General Physics: Quantum Computing Physics: Quantum Physics
Published

Quantum physics: Superconducting Nanowires Detect Single Protein Ions      (via sciencedaily.com)     Original source 

An international research team has achieved a breakthrough in the detection of protein ions: Due to their high energy sensitivity, superconducting nanowire detectors achieve almost 100% quantum efficiency and exceed the detection efficiency of conventional ion detectors at low energies by a factor of up to a 1,000. In contrast to conventional detectors, they can also distinguish macromolecules by their impact energy. This allows for more sensitive detection of proteins and it provides additional information in mass spectrometry.

Anthropology: General Paleontology: Climate
Published

Aging societies more vulnerable to collapse      (via sciencedaily.com)     Original source 

Societies and political structures, like the humans they serve, appear to become more fragile as they age, according to an analysis of hundreds of pre-modern societies. A new study, which holds implications for the modern world, provides the first quantitative support for the theory that the resilience of political states decreases over time. 

Anthropology: General Archaeology: General
Published

'Bone biographies' reveal lives of medieval England's common people -- and illuminate early benefits system      (via sciencedaily.com)     Original source 

Researchers give medieval Cambridge residents the 'Richard III treatment' to reveal hard-knock lives of those in the city during its famous university's early years. Study of over 400 remains from a hospital cemetery shows spectrum of medieval poverty, and suggests that some of Cambridge University's earliest scholars ended up in penury.   

Anthropology: Cultures Anthropology: Early Humans Anthropology: General
Published

Paleolithic humans may have understood the properties of rocks for making stone tools      (via sciencedaily.com)     Original source 

Research suggests that Paleolithic humans in the Middle East selected flint for their cutting tools based on differences in the mechanical properties of the rock. They seem to have purposefully selected the most suitable rocks for fashioning into tools, even being able to distinguish rocks that were unsuitable.

Anthropology: Early Humans Anthropology: General Biology: Biochemistry Biology: Evolutionary Biology: General Biology: Genetics Ecology: Animals
Published

A mixed origin made maize successful      (via sciencedaily.com)     Original source 

Maize is one of the world's most widely grown crops. It is used for both human and animal foods and holds great cultural significance, especially for indigenous peoples in the Americas. Yet despite its importance, the origins of the grain have been hotly debated for more than a century. Now new research shows that all modern maize descends from a hybrid created just over 5000 years ago in central Mexico, thousands of years after the plant was first domesticated.

Chemistry: Inorganic Chemistry Computer Science: Quantum Computers Energy: Technology Physics: General Physics: Quantum Computing Physics: Quantum Physics
Published

Researchers show an old law still holds for quirky quantum materials      (via sciencedaily.com)     Original source 

Long before researchers discovered the electron and its role in generating electrical current, they knew about electricity and were exploring its potential. One thing they learned early on was that metals were great conductors of both electricity and heat. And in 1853, two scientists showed that those two admirable properties of metals were somehow related: At any given temperature, the ratio of electronic conductivity to thermal conductivity was roughly the same in any metal they tested. This so-called Wiedemann-Franz law has held ever since -- except in quantum materials. Now, a theoretical argument put forth by physicists suggests that the law should, in fact, approximately hold for one type of quantum material, the cuprate superconductors.

Anthropology: General Archaeology: General Environmental: Ecosystems Environmental: General Geoscience: Earth Science Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography Paleontology: Climate
Published

Decoding past climates through dripstones      (via sciencedaily.com)     Original source 

A recent study demonstrates how dripstones can be crucial for reconstructing past climates. The new approach can provide a detailed picture of the climate around early human occupations in South Africa.

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

Dishing the dirt on human evolution: Why scientific techniques matter in archaeology      (via sciencedaily.com)     Original source 

Scientists should seek answers hidden in the dirt using proven and state-of-the-art archaeological science techniques to support new discoveries about human evolution following recent controversies at a cave site in Africa, says a group of international experts. Their recommendations follow claims published in June of this year that Homo naledi --a small-brained human species -- buried their dead in Rising Star Cave, South Africa, between 335,000 and 241,000 years ago, and may also have decorated the cave walls with engravings.

Anthropology: Cultures Anthropology: General Archaeology: General Biology: Biochemistry Biology: General Biology: Microbiology
Published

Study of ancient British oral microbiomes reveals shift following Black Death      (via sciencedaily.com)     Original source 

The Second Plague Pandemic of the mid-14th century, also known as the Black Death, killed 30-60 percent of the European population and profoundly changed the course of European history. New research suggests that this plague, potentially through resulting changes in diet and hygiene, may also be associated with a shift in the composition of the human oral microbiome toward one that contributes to chronic diseases in modern-day humans.  

Physics: General Physics: Optics Physics: Quantum Computing Physics: Quantum Physics
Published

What was thought of as noise, points to new type of ultrafast magnetic switching      (via sciencedaily.com)     Original source 

Researchers discover a new type of ultrafast magnetic switching by investigating fluctuations that normally tend to interfere with experiments as noise.

Chemistry: Biochemistry Chemistry: Inorganic Chemistry Physics: General Physics: Optics Physics: Quantum Physics
Published

Compact accelerator technology achieves major energy milestone      (via sciencedaily.com)     Original source 

Researchers have demonstrated a compact particle accelerator less than 20 meters long that produces an electron beam with an energy of 10 billion electron volts (10 GeV). There are only two other accelerators currently operating in the U.S. that can reach such high electron energies, but both are approximately 3 kilometers long. This type of accelerator is called a wakefield laser accelerator.

Anthropology: General Archaeology: General Environmental: Ecosystems Offbeat: Earth and Climate Offbeat: General Offbeat: Paleontology and Archeology
Published

Was 'witchcraft' in the Devil's Church in Koli based on acoustic resonance? The crevice cave has a unique soundscape      (via sciencedaily.com)     Original source 

The national park of Koli in eastern Finland is home to a famous, 34-metre-long crevice cave known as Pirunkirkko, or Devil's Church in English. A new study investigates the acoustics of the Devil's Church and explores whether the acoustic properties of the cave could explain the beliefs associated with it, and why it was chosen as a place for activities and rituals involving sound.

Physics: General Physics: Quantum Physics Space: Astronomy Space: Astrophysics Space: Cosmology Space: Exploration Space: General Space: Structures and Features
Published

New way of searching for dark matter      (via sciencedaily.com)     Original source 

Wondering whether whether Dark Matter particles actually are produced inside a jet of standard model particles, led researchers to explore a new detector signature known as semi-visible jets, which scientists never looked at before.

Chemistry: Biochemistry Offbeat: General Physics: General Physics: Quantum Computing Physics: Quantum Physics
Published

'Strange metal' is strangely quiet in noise experiment      (via sciencedaily.com)     Original source 

Experiments have provided the first direct evidence that electricity seems to flow through 'strange metals' in an unusual liquid-like form.

Offbeat: Computers and Math Offbeat: General Physics: General Physics: Quantum Physics
Published

First experimental evidence of hopfions in crystals opens up new dimension for future technology      (via sciencedaily.com)     Original source 

Hopfions, magnetic spin structures predicted decades ago, have become a hot and challenging research topic in recent years. New findings open up new fields in experimental physics: identifying other crystals in which hopfions are stable, studying how hopfions interact with electric and spin currents, hopfion dynamics, and more.

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

Neanderthals were the world's first artists, research reveals      (via sciencedaily.com)     Original source 

Recent research has shown that engravings in a cave in La Roche-Cotard (France), which has been sealed for thousands of years, were actually made by Neanderthals. The findings reveal that the Neanderthals were the first humans with an appreciation of art.

Anthropology: Early Humans Anthropology: General Biology: Biochemistry Biology: Botany Biology: Cell Biology Biology: General Biology: Microbiology Ecology: Nature Ecology: Trees Paleontology: Fossils
Published

Looking for 'LUCA' and the timing of cellular evolution      (via sciencedaily.com)     Original source 

LUCA, the 'last universal common ancestor' of all living organisms, lived 4.32 to at most 4.52 billion years ago. What LUCA looked like is unknown, but it must have been a cell with among others ribosomal proteins and an ATP synthase.