The plight of the Kalahari San
Over the past few decades, San (Bushmen) communities in southern Africa, former hunter-gatherers, have developed new adaptive strategies to cope with climate change, the presence of other groups on their land, and the impacts of globalization. While San have likely lived in southern Africa for 20,000 to 40,000 years, they remain politically and economically marginalized in relation to other social...
A biologist and a historian are looking for art to trace fruit and vegetable evolution
Plant geneticists seeking to understand the history of the plants we eat can decode the genomes of ancient crops from rare, well-preserved samples. However, this approach leaves significant gaps in the timelines of where and when many modern-day fruits, vegetables, and cereal crops evolved, and paints an incomplete picture of what they looked like. A Science & Society article publishing July 14th...
Scientists achieve first complete assembly of human X chromosome
Although the current human reference genome is the most accurate and complete vertebrate genome ever produced, there are still gaps in the DNA sequence, even after two decades of improvements. Now, for the first time, scientists have determined the complete sequence of a human chromosome from one end to the other ('telomere to telomere') with no gaps and an unprecedented level of accuracy.
Ancient oyster shells provide historical insights
An interdisciplinary team of scientists studying thousands of oyster shells along the Georgia coast, some as old as 4,500 years, has published new insights into how Native Americans sustained oyster harvests for thousands of years, observations that may lead to better management practices of oyster reefs today.
NASA infrared view finds small areas of strength in new depression 6E
NASA's Aqua satellite used infrared light to identify the strongest storms and coldest cloud top temperatures in Tropical Depression 6E. Aqua found a few small areas of strength but cooler sea surface temperatures are expected to weaken them.
Innovative catalytic reaction for low-cost synthesis of aromatic esters
Aromatic esters are chemicals that contain an aromatic ring consisting of functional groups called esters. These organic compounds are widely used as chemical feedstock in industries like food and beverages, pharmaceuticals, and cosmetics. Thus, finding efficient reactions for their synthesis is an important area of research in organic chemistry.
For chimpanzees, salt and pepper hair not a marker of old age
Silver strands and graying hair is a sign of aging in humans, but things aren't so simple for our closest ape relatives—the chimpanzee. A new study published today in the journal PLOS ONE by researchers at the George Washington University found graying hair is not indicative of a chimpanzee's age.
Converting female mosquitoes to non-biting males with implications for mosquito control
Virginia Tech researchers have proven that a single gene can convert female Aedes aegypti mosquitoes into fertile male mosquitoes and identified a gene needed for male mosquito flight.
What determines a warbler's colors?
A new study has narrowed down the region of the genome that drives the black color in throat and face of warblers by studying the hybrid offspring produced when two species mate. The hybrids of golden-winged and blue-winged warblers have a mix of coloration from the parent species, which allows researchers to identify which regions of the genome are associated with which color patterns. The study,...
Physicists introduce novel mechanism for electron optics in solid-state systems
Electrons can interfere in the same manner as water, acoustical or light waves do. When exploited in solid-state materials, such effects promise novel functionality for electronic devices, in which elements such as interferometers, lenses or collimators could be integrated for controlling electrons at the scale of mirco- and nanometres. However, so far such effects have been demonstrated mainly in...
No evidence that predator control will save mountain caribou, study says
Addressing potential threats from predators has not slowed the dramatic decline of mountain caribou in British Columbia and Alberta, according to a new study by scientists from the University of Alberta and two other western Canadian universities.
China rushes to contain floods after record rainfall
Soldiers erected sandbag flood barriers in a city near China's largest freshwater lake after the heaviest rainfall in nearly six decades drenched the swollen Yangtze River basin.
Imaging of sequential potential distribution changes in electrodes during charge/discharge
NIMS has succeeded for the first time in visualizing sequential changes in electrical potential distribution across a composite electrode during charge/discharge reactions in all-solid-state lithium ion batteries. This distribution was previously measureable only before and after the occurrence of charge/discharge reactions. Microscopic understanding of charge/discharge reaction mechanisms in...
Veterinarians urge pet owners to prepare for the arrival of rabbit hemorrhagic disease
An emerging virus threatens both wild and pet rabbits in the United States. The fatal virus—which causes an Ebola-like disease called rabbit hemorrhagic disease—already has been reported in the western and southwestern United States.
The geographies of COVID-19
A pneumonia of unknown cause was first reported to the World Health Organization (WHO) on 31 December 2019 in China's Hubei Province.
Report calls for government to 'level up' Stoke-on-Trent economy
Stoke-on-Trent faces an increased threat of poverty and destitution due to the COVID-19 crisis, a new report reveals.
29,000 years of Aboriginal history
The known timeline of the Aboriginal occupation of South Australia's Riverland region has been vastly extended by new research led by Flinders University in collaboration with the River Murray and Mallee Aboriginal Corporation (RMMAC).
Pesticide mixtures a bigger problem than previously thought
New research led by The University of Queensland has provided the first comprehensive analysis of pesticide mixtures in creeks and rivers discharging to the Great Barrier Reef.
Evolution after Chicxulub asteroid impact: Rapid response of life to end-cretaceous mass
The impact event that formed the Chicxulub crater (Yucatán Peninsula, México) caused the extinction of 75% of species on Earth 66 million years ago, including non-avian dinosaurs. One place that did not experience much extinction was the deep, as organisms living in the abyss made it through the mass extinction event with just some changes to community structure.
Tale of the tape: Sticky bits make better batteries
Where things get sticky happens to be where interesting science happens in a Rice University lab working to improve battery technology.
Underused part of the electromagnetic spectrum gets optics boost from metamaterial
Terahertz radiation, or T-rays, has barely been exploited compared to most of the rest of the electromagnetic spectrum. Yet T-rays potentially have applications in next-generation wireless communications (6G/7G), security systems, biomedicine, and even art history. A new device for controlling T-rays using a specially designed 'metasurface' with properties not found in nature could begin to...
Could recently spotted dim point sources explain the galactic center excess (GCE)?
Over the past decade or so, a number of astrophysics studies have detected an excess of gamma-ray radiation at the center of our galaxy. Despite the many attempts to understand this unexpected surplus of radiation, now known as the galactic center excess (GCE), its source and the reasons why it exists remain unknown.
Road traffic microplastics flooding world's oceans: study
Airborne microplastics from traffic pollution may be entering the world's oceans at a similar rate to that from rivers, according to new research Tuesday warning that the particles may also speed up Arctic ice melt.
Burger King addresses climate change by changing cows' diets
Burger King is staging an intervention with its cows.
Review of progress towards advanced Lithium-sulfur batteries
How should one design porous carbon materials for advanced Li-S batteries cathodes? What electrolytes are extensively studied for high-safety Li-S batteries? In a paper published in Nano, a group of researchers from Qingdao, China have reviewed the recent progress in sulfur/carbon cathode materials and high safety electrolytes towards advanced Li-S batteries. Some potential issues and possible...