141 articles from MONDAY 2.8.2021
Spanish cave art was made by Neanderthals, study confirms
Study says pigments on cave stalagmites were applied through ‘splattering and blowing’ more than 60,000 years agoNeanderthals, long perceived to have been unsophisticated and brutish, really did paint stalagmites in a Spanish cave more than 60,000 years ago, according to a study published on Monday.The issue had roiled the world of paleoarchaeology ever since the publication of a 2018 paper...
Trapped saltwater caused mangrove death after Hurricane Irma
When Hurricane Irma hit southern Florida in September of 2017, the storm buffeted coastal mangrove forests with winds over 116 mph—strong enough to rip off leaves, break branches, and snap tree trunks in half. Of the mangrove forest damaged by Hurricane Irma, about 83% recovered after the first year. But the rest didn't, leaving scientists wondering why some trees didn't bounce back.
Deep learning and holography create a better point-of-care sensor
Agglutination assays are widely used immunological sensors based on antigen-antibody interactions that result in clumping of antibody-coated microscopic particles. Once the sample—for example, a patient's serum—is introduced, the corresponding target antigens in the sample rapidly attach to the antibody binding sites and the particles start to form clusters due to the target antigen's...
New DNA study provides critical information on conserving rainforest lizards
A study published June 16 in Biotropica by a team of researchers at the University of Washington, the UW Burke Museum of Natural History and Culture, WWF Hong Kong and the University of Colombo has provided an important road map to conserving rough-nosed horned lizards in Sri Lanka.
New DNA study provides critical information on conserving rainforest lizards
- ScienceDaily
- 21/8/2 22:07
Researchers have provided an important road map to conserving rough-nosed horned lizards in Sri Lanka.
Thawing permafrost releases greenhouse gas from depth
- ScienceDaily
- 21/8/2 22:07
Geologists compared the spatial and temporal distribution of methane concentrations in the air of northern Siberia with geological maps. The result: the methane concentrations in the air after last year's heat wave indicate that increased gas emissions came from limestone formations.
Punishment enforces 'cooperation' in the fig-wasp mutualism: The exception proves the rule
- ScienceDaily
- 21/8/2 22:06
Mutually beneficial relationships are common, but what happens when one partner stops enforcing the other's good behavior? An exception to the usual relationship between figs and their pollinator-wasps, may hold the answer.
Researchers identify approach for potential nontypeable haemophilus influenzae vaccine
- ScienceDaily
- 21/8/2 22:06
Scientists have identified two proteins that could be used for a potential vaccine against nontypeable Haemophilus influenzae (NTHi). Working in a mouse model, the investigators found that administering two bacterial adhesive proteins that play a key role in helping the bacteria to latch on to respiratory cells and initiate respiratory tract infection stimulated protective immunity against diverse...
Cryptic transcription, a novel phenomenon in mammalian stem cells, linked to aging
- ScienceDaily
- 21/8/2 22:06
Researchers have discovered that a cellular phenomenon called cryptic transcription, which had been previously described and linked to aging in yeasts and worms, is also involved in mammalian aging. They also discovered a mechanism that triggers the phenomenon in mammals.
Productivity of kelp forests, sans the iconic kelp
- ScienceDaily
- 21/8/2 22:06
A lush canopy is a defining feature of most of the planet's forests. But canopy-forming species can be particularly vulnerable to disturbances and environmental change. So the question is: What is a forest without its trees?
Miniature brain models developed to study causes of Alzheimer’s disease and to test drugs in development
- ScienceDaily
- 21/8/2 22:06
Researchers have developed a powerful miniature brain platform to study the mechanistic causes of Alzheimer's disease and to test dementia drugs in development.
Why is this weird, metallic star hurtling out of the Milky Way?
- ScienceDaily
- 21/8/2 22:06
About 2,000 light-years away from Earth, there is a star catapulting toward the edge of the Milky Way. This particular star is one of a unique breed of fast-moving stars -- remnant pieces of massive white dwarf stars -- that have survived in chunks after a gigantic stellar explosion.
Synthetic hinge could hold key to revolutionary 'smart' insulin therapy
- ScienceDaily
- 21/8/2 22:06
For people with diabetes who are insulin dependent, glycemic control is a full-time job. But what if their medication could do the work for them -- an insulin whose activity in the bloodstream responds to the blood glucose levels and adjusts accordingly? A new invention could lead to just that.
Seeing better by looking away
- ScienceDaily
- 21/8/2 22:06
When we fixate an object, its image does not appear at the place where photoreceptors are packed most densely. Instead, its position is shifted slightly nasally and upwards from the cellular peak. Researchers observed such offsets in both eyes of 20 healthy subjects, and speculate that the underlying fixation behavior improves overall vision.
How headless hydra feel, react to prodding
- ScienceDaily
- 21/8/2 22:06
Researchers identify redundant neural networks in jellyfish-like, freshwater hydra. The work is a step toward modeling how internal states and external stimuli shape the behavior of an organism with a highly dynamic neural architecture.
New treatment option for advanced urothelial cancer patients shows promise in a phase 2 clinical trial
- ScienceDaily
- 21/8/2 22:06
A new treatment for advanced urothelial cancer was effective with tolerable side effects in an international, multi-center phase 2 clinical trial. The trial results prompted a U.S. Food and Drug Administration (FDA) accelerated approval of the treatment on April 13, giving patients with this very aggressive type of cancer a new therapeutic option.
Neanderthals indeed painted Andalusia’s Cueva de Ardales
- ScienceDaily
- 21/8/2 22:06
The origin and date of appearance of prehistoric cave art are the subjects of ongoing debate. Spain's Cueva de Ardales is one point of discussion. There a flowstone formation is stained red in places. This coloring is apparently almost 65,000 years old but until now, a part of the scientific community attributed it to a natural coating of iron oxide deposited by flowing water. However, that...
Team uses 3D printing to optimize flow-through electrodes for electrochemical reactors
To take advantage of the growing abundance and cheaper costs of renewable energy, Lawrence Livermore National Laboratory (LLNL) scientists and engineers are 3D printing flow-through electrodes (FTEs), core components of electrochemical reactors used for converting CO2 and other molecules to useful products.
Finding the cause of a fatal problem in rocket engine combustors
Rocket engines contain confined combustion systems, which are essentially combustion chambers. In these chambers, nonlinear interactions among turbulent fuel and oxidizer flows, sound waves, and heat produced from chemical reactions cause an unstable phenomenon called "combustion oscillations." The force of these oscillations on the body of the combustion chamber—the mechanical stress on the...
How we see better by 'looking away'
When we fixate an object, its image does not appear at the place where photoreceptors are packed most densely. Instead, its position is shifted slightly nasally and upwards from the cellular peak. This is shown in a recent study conducted at the University of Bonn (Germany), published in the journal Current Biology. The researchers observed such offsets in both eyes of 20 healthy subjects, and...
New model tracks carbon in agroecosystems
Carbon is everywhere. It's in the atmosphere, in the oceans, in the soil, in our food, in our bodies. As the backbone of all organic molecules that make up life, carbon is a very accurate predictor of crop yields. And soil is the largest carbon pool on earth, playing an important role in keeping our climate stable.
Researchers use virtual reality to demonstrate effectiveness of 3D visualization as a learning tool
Researchers from the Neuroimaging Center at NYU Abu Dhabi (NYUAD) and Wisconsin Institute for the Discovery at University Wisconsin-Madison have developed the UW Virtual Brain Project, producing unique, interactive, 3D narrated diagrams to help students learn about the structure and function of perceptual systems in the human brain. A new study exploring how students responded to these lessons on...
Why is this weird, metallic star hurtling out of the Milky Way?
About 2,000 light-years away from Earth, there is a star catapulting toward the edge of the Milky Way. This particular star, known as LP 40−365, is one of a unique breed of fast-moving stars—remnant pieces of massive white dwarf stars—that have survived in chunks after a gigantic stellar explosion.
Overfishing and other human pressures are severely harming marine protected areas worldwide
A new study by Tel Aviv University reveals significant ecological damage to many MPAs around the world. The study findings point to a strong "edge effect" in MPAs, i.e. a sharp 60% reduction in the fish population living at the edges of the MPA (up to a distance of 1-1.5 km within the MPA) compared to core areas. The "edge effect" significantly diminishes the effective size of the MPA, and largely...
Closeness with dads may play special role in how kids weather adolescence
Adolescence can be an emotionally turbulent time, but new research at Penn State found that close, supportive relationships with parents—especially dads—at key points during adolescence can help stave off certain adjustment problems.
Pulsed lasers in liquids speed up the hunt for effective catalysts
Chemical catalysts are the change agents behind the production of just about everything we use in our daily lives, from plastics to prescription drugs. When the right catalysts are mixed with the right chemical compounds, molecules that would otherwise take years to interact do so in mere seconds.
Punishment enforces cooperation in the fig-wasp mutualism: The exception proves the rule
Removal of an offender's hand, tongue or ear: punishments described in Babylon's Hammurabi Code, depended on the nature of the crime. Published in 1771 B.C., the code set the first formal standards for business interactions. But scientists disagree about whether punishment is necessary to maintain mutually-beneficial interactions between animals and plants in nature. In a new study in Proceedings...
Thawing permafrost releases greenhouse gas from depth
Which effects did the heat wave of summer 2020 have in Siberia? In a study led by the University of Bonn (Germany), geologists compared the spatial and temporal distribution of methane concentrations in the air of northern Siberia with geological maps. The result: the methane concentrations in the air after last year's heat wave indicate that increased gas emissions came from limestone formations....
Study confirms ancient Spanish cave art was made by Neanderthals
Neanderthals, long perceived to have been unsophisticated and brutish, really did paint stalagmites in a Spanish cave more than 60,000 years ago, according to a study published on Monday.