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Antidepressant harms baby neurons in lab-grown 'mini-brains'  

Researchers have demonstrated the use of stem-cell-derived 'mini-brains' to detect harmful side effects of a common drug on the developing brain. Mini-brains are miniature human brain models, developed with human cells and barely visible to the human eye, whose cellular mechanisms mimic those of the developing human brain.

what do you think?

2020-02-21 13:25:15



Researchers Map Structure of Coronavirus "Spike" Protein  

The finding could help lay the groundwork for a vaccine -- Read more on ScientificAmerican.com

what do you think?

2020-02-21 12:52:47



Earliest interbreeding event between ancient human populations discovered  

A new study documented the earliest known interbreeding event between ancient human populations -- a group known as the 'super-archaics' in Eurasia interbred with a Neanderthal-Denisovan ancestor about 700,000 years ago. The event was between two populations more distantly related than any other recorded. The authors proposed a revised timeline for human migration out of Africa and into Eurasia. The method for analyzing ancient DNA provides a new way to look farther back into the human lineage.

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2020-02-21 12:07:58



Therapeutic cooling effectively targets site of brain injury  

Investigators successfully measure brain temperature in newborn babies undergoing therapeutic cooling, showing that the treatment effectively targets the core of the brain.

what do you think?

2020-02-21 11:01:39



Colorado River Is in Danger of a Parched Future  

The river is due to lose up to 31 percent of its flow by midcentury—an alarming trend that could affect 40 million people -- Read more on ScientificAmerican.com

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2020-02-21 10:23:48



Frozen bird turns out to be 46,000-year-old horned lark  

Scientists have recovered DNA from a well-preserved horned lark found in Siberian permafrost. The results can contribute to explaining the evolution of sub species, as well as how the mammoth steppe transformed into tundra, forest and steppe biomes at the end of the last Ice Age.

what do you think?

2020-02-21 09:56:38



African Killfish Can Put Aging on Pause. Do They Hold the Secrets of Longevity?   

As the fish's embryos enter a hibernation-like state, their DNA changes and keeps tissues from aging or deteriorating.

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2020-02-21 09:53:23



How transient invaders can transform an ecosystem  

Study finds microbes can alter an environment dramatically before dying out.

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2020-02-21 09:23:59



Scientists Sculpt Nanoparticle Shells with Light  

Hollowed-out microcrystals could lock away carbon  -- Read more on ScientificAmerican.com

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2020-02-21 08:51:38



Bumble bees can experience an object using one sense and later recognize it using another  

The ability to recognize objects across different senses is present in the tiny brains of an insect, researchers have discovered.

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2020-02-21 07:10:17



A little good is good enough -- excuses and 'indulgence effects' in consumption  

Ecofriendly materials, produced under good work conditions -- convincing arguments for most of us. But how do consumers really weigh compliance with such ethical standards? Not as much as they think: Researchers used an example from textile industry to demonstrate that customers unconsciously use a single ethical aspect as an excuse for less moral behavior regarding other aspects. They report about these 'indulgence effects' and their significance in a recent article.

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2020-02-21 05:59:47



New strategies for helping children process negative emotions  

A recent study of indigenous people in southern Chile challenges Western assumptions about children's emotional capabilities and highlights the value of spending time outdoors to help children regulate their emotions.

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2020-02-21 05:24:01



The Art of Animal Adaptation  

Species across the globe have been forced to adapt to humans’ effects on the environment. An upcoming book illustrates some unexpected examples of this dynamic -- Read more on ScientificAmerican.com

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2020-02-21 05:13:09



Medicine as Meditation  

What a doctor learned from a chaplain -- Read more on ScientificAmerican.com

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2020-02-21 04:44:57



New method to isolate atomic sheets and create new materials  

Researchers have invented a new method -- using ultraflat gold films -- to disassemble vdW single crystals layer by layer into monolayers with near-unity yield and with dimensions limited only by bulk crystal sizes. The monolayers have the same high quality as those created by conventional 'Scotch tape' exfoliation, but are roughly a million times larger. They can be assembled into macroscopic artificial structures, with properties not easily created in conventionally grown bulk crystals.

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2020-02-21 04:31:40



How Cold Is It in Outer Space?  

Even the coldest places on Earth do not compare to how frigid outer space is.

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2020-02-21 03:55:57



Young Bats and Snakes Look Identical  

Originally published in September 1849 -- Read more on ScientificAmerican.com

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2020-02-21 03:25:30



Origins of immune system mapped, opening doors for new cancer immunotherapies  

A first cell atlas of the human thymus gland could lead to new immune therapies to treat cancer and autoimmune diseases. Researchers mapped thymus tissue through the human lifespan to understand how it develops and makes vital immune cells called T cells. In the future, this information could help researchers to generate an artificial thymus and engineer improved therapeutic T cells.

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2020-02-21 03:09:04



Pill-sized 'heater' could increase accessibility in diagnosing infectious disease  

Researchers have developed a tiny 'heater' -- about the size of a pill -- that could allow resource-limited regions around the world to test for infectious diseases without the need for specialized training or costly lab equipment.

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2020-02-21 02:23:35



So Is It Okay to Eat More Red and Processed Meat?  

A study last October said so, but the journal’s decision to publish wasn’t necessarily okay -- Read more on ScientificAmerican.com

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2020-02-21 02:02:51



For 'blade runners' taller doesn't necessarily mean faster  

The governing body for the Paralympics recently lowered the allowable height for sprinters who use prosthetic legs, or blades, during competition. The rules are based on the assumption that the taller you are the faster you run. But a new study has found otherwise.

what do you think?

2020-02-20 21:42:32



Huge stores of Arctic sea ice likely contributed to past climate cooling  

Climate scientists propose that massive amounts of melting sea ice in the Arctic drained into the North Atlantic and disrupted climate-steering currents, thus playing an important role in causing past abrupt climate change after the last Ice Age, from about 8,000 to 13,000 years ago.

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2020-02-20 20:50:24



Like Humans, Bumblebees Can Recognize Objects Through Touch  

It seems simple, but only a few animals are capable of identifying objects across senses.

what do you think?

2020-02-20 19:57:08



DNA from ancient packrat nests helps unpack Earth's past  

New work shows how using next-generation DNA sequencing on ancient packrat middens -- nests made out of plant material, fragments of insects, bones, fecal matter, and urine -- could provide ecological snapshots of Earth's past. The study may pave the way for scientists to better understand how plant communities -- and possibly animals, bacteria, and fungi as well -- will respond to human-caused climate change.

what do you think?

2020-02-20 17:38:50



How newborn stars prepare for the birth of planets  

Astronomers used two of the most powerful radio telescopes in the world to create more than three hundred images of planet-forming disks around very young stars in the Orion Clouds. These images reveal new details about the birthplaces of planets and the earliest stages of star formation.

what do you think?

2020-02-20 16:04:04



Physicists grab individual atoms in ground-breaking experiment  

In a first for quantum physics, researchers have 'held' individual atoms in place and observed previously unseen complex atomic interactions.

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2020-02-20 13:57:57



Risk of coronavirus importation in Africa  

Egypt, Algeria and Republic of South Africa are the African countries most at risk for coronavirus COVID-19 importation in the continent, due to high air traffic with the contaminated Chinese provinces. But these countries are also among the best equipped on the continent to quickly detect and deal with new cases. In other African countries, the risk of importation is lower, but health organization deficiencies raise concerns about rapid spread.

what do you think?

2020-02-20 13:50:16



Bacteria on the International Space Station no more dangerous than earthbound strains  

Two particularly tenacious species of bacteria have colonized the potable water dispenser aboard the International Space Station (ISS), but a new study suggests that they are no more dangerous than closely related strains on Earth.

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2020-02-20 13:43:51



Solar and Wind Power Could Ignite a Hydrogen Energy Comeback  

Hydrogen, produced from water by surplus electricity, could power industry and the grid -- Read more on ScientificAmerican.com

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2020-02-20 12:46:08



Cleaning Fumes Linger a Long Time in Your Home — and Cracking a Window Doesn't Help  

Chemicals from cooking and cleaning linger on household surfaces for longer than a day or two.

what do you think?

2020-02-20 12:40:49



A better pregnancy test for whales  

To determine whale pregnancy, researchers have relied on visual cues or hormone tests of blubber collected via darts, but the results were often inconclusive. Research points to a weakness of previous testing and evaluation methods and provides a new hormone testing regime that offers better results.

what do you think?

2020-02-20 12:04:41



Watching TV helps birds make better food choices  

By watching videos of each other eating, blue tits and great tits can learn to avoid foods that taste disgusting and are potentially toxic, a new study has found.

what do you think?

2020-02-20 11:15:49



18-hour year planet on edge of destruction  

Astronomers from the University of Warwick have observed an exoplanet orbiting a star in just over 18 hours, the shortest orbital period ever observed for a planet of its type.

what do you think?

2020-02-20 11:15:46



New studies explore how knowledge drives action in climate change decision-making  

In several new studies, researchers explore the importance of learning and knowledge in environmental decision-making and the different ways in which scientific knowledge can become more relevant and useful for societies.

what do you think?

2020-02-20 10:29:06



Social Spiders and Science Fraud  

Reflections on a new case of apparent data manipulation

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2020-02-20 10:26:58



Curing genetic disease in human cells  

Scientists show for the first time that a newer type of CRISPR, called base-editing, can safely cure cystic fibrosis in stem cells derived from patients.

what do you think?

2020-02-20 10:16:01



Earth formed much faster than previously thought, new study shows  

By measuring iron isotopes, researchers have shown that our planet originally formed much faster than previously thought. This finding provides new insights on both planetary formation and the likelihood of water and life elsewhere in the universe.

what do you think?

2020-02-20 09:55:24



Fifty years of data show new changes in bird migration  

A growing body of research shows that birds' spring migration has been getting earlier and earlier in recent decades. New research on Black-throated Blue Warblers, a common songbird that migrates from Canada and the eastern US to Central America and back every year, uses fifty years of bird-banding data to add another piece to the puzzle, showing that little-studied fall migration patterns have been shifting over time as well.

what do you think?

2020-02-20 09:43:19



Cell biology: How to keep the nucleus clean  

RNA turnover in the nuclei of eukaryotic cells is controlled by the RNA exosome aided by numerous cofactors. Researchers at now show how two major nuclear exosome cofactors recognize their RNA targets to keep a clean nuclear environment. This is important for the health of our cells - and thus humans.

what do you think?

2020-02-20 09:37:12



'Wood' you like to recycle concrete?  

Scientists studied a method for recycling unused concrete with wood fibers. They found the conditions that produce new building materials with bending strength even greater than the original concrete. This work may help reduce the CO2 emissions associated with manufacturing new concrete.

what do you think?

2020-02-20 09:18:30



Climate Change Sparked Note of Consensus in Raucous Democratic Debate  

The main point of disagreement on climate was on the role of fracking and natural gas in a clean energy transition -- Read more on ScientificAmerican.com

what do you think?

2020-02-20 09:18:25



Sub-Neptune sized planet validated with the habitable-zone planet finder  

A signal originally detected by the Kepler spacecraft has been validated as an exoplanet using the Habitable-zone Planet Finder.

what do you think?

2020-02-20 08:35:54



Air Quality is Worse in African American Neighborhoods. This Community is Fighting Pollution with Data  

Equipped with air quality sensors, an African American neighborhood in Charlotte, North Carolina, is trying to reverse decades of environmental injustice.

what do you think?

2020-02-20 08:30:29



New front opened in fight against common cancer driver  

Researchers have revealed a new vulnerability in lymphomas that are driven by one of the most common cancer-causing changes in cells. The team hopes that this could be a new target for treating a range of cancers.

what do you think?

2020-02-20 08:29:41



Journey to the center of Mars  

While InSight's seismometer has been patiently waiting for the next big marsquake to illuminate its interior and define its crust-mantle-core structure, two scientists, have built a new compositional model for Mars. They used rocks from Mars and measurements from orbiting satellites to predict the depth to its core-mantle boundary, some 1,800 km beneath the surface and have been able to suggest that its core contains moderate amounts of sulfur, oxygen and hydrogen as light elements.

what do you think?

2020-02-20 08:15:28



Bumblebees Solve a 17th-Century Psychological Puzzle  

By answering the question posed in Molyneux’s problem the invertebrates may have demonstrated an ability to internally represent objects -- Read more on ScientificAmerican.com

what do you think?

2020-02-20 08:15:10



Scientists Question China's Decision Not to Report Symptom-Free Coronavirus Cases  

Researchers say that excluding these people could conceal the epidemic’s true extent, but others say the practice makes sense -- Read more on ScientificAmerican.com

what do you think?

2020-02-20 07:58:51



New artificial intelligence algorithm better predicts corn yield  

With some reports predicting the precision agriculture market will reach $12.9 billion by 2027, there is an increasing need to develop sophisticated data-analysis solutions that can guide management decisions in real time. A new study offers a promising approach to efficiently and accurately process precision agricultural data.

what do you think?

2020-02-20 07:51:23



Water reuse could be key for future of hydraulic fracturing  

Enough water will come from the ground as a byproduct of oil production from unconventional reservoirs during the coming decades to theoretically counter the need to use fresh water for hydraulic fracturing operations in many of the nation's large oil-producing areas. While other industries might want to recycle some of that water for their own needs, water quality issues and the potential costs involved may be prohibitive.

what do you think?

2020-02-20 07:24:08



Beyond the brim, Sombrero Galaxy's halo suggests turbulent past  

These latest Hubble observations of the Sombrero galaxy indicate only a tiny fraction of older, metal-poor stars in the halo, plus an unexpected abundance of metal-rich stars. Past major galaxy mergers are a possible explanation, though the stately Sombrero shows none of the messy evidence of a recent merger of massive galaxies.

what do you think?

2020-02-20 07:04:22



New discovery has important implications for treating common eye disease  

Scientists have made an important discovery with implications for those living with a common, debilitating eye disease (age-related macular degeneration, AMD) that can cause blindness. They have discovered that the molecule TLR2, which recognises chemical patterns associated with infection in the body, also seems to play an important role in the development of retinal degeneration. When TLR2 is removed in model systems, a degree of protection is conferred.

what do you think?

2020-02-20 06:19:44



Scientists develop safer lead-based perovskite solar cell  

Researchers are reporting on a potential breakthrough in the development of hybrid perovskite solar cells. The scientists developed a technique to sequester the lead used to make perovskite solar cells and minimize potential toxic leakage.

what do you think?

2020-02-20 05:49:25



New Horizons May Have Solved Planet-Formation Cold Case  

An encounter with Arrokoth at the outskirts of the solar system offers the best evidence yet for how worlds coalesce from dust -- Read more on ScientificAmerican.com

what do you think?

2020-02-20 05:30:19



Magnet-controlled bioelectronic implant could relieve pain  

An electrical and computer engineer has introduced the first neural implant that can be programmed and charged remotely with a magnetic field.

what do you think?

2020-02-20 05:29:15



If You Want Creative Solutions, Keep Your Team Small  

Large collaborations in science are sometimes necessary, but size can also stifle innovation -- Read more on ScientificAmerican.com

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2020-02-20 05:27:09



Illuminating interactions between decision-making and the environment  

Employing a game theory model, researchers demonstrate how strategic decisions influence the environment in which those decisions are made, alterations which in turn influence strategy. Their analysis, which identifies how incentives can tip a strategy from one extreme to another, applies to fields as diverse as fisheries dynamics to climate change policy.

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2020-02-20 05:24:52



99 Percent of Families Prefer Yeasty Bread  

Originally published in February 1860 -- Read more on ScientificAmerican.com

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2020-02-20 05:18:27



Methane emitted by humans vastly underestimated  

Researchers measured methane levels in ancient air samples and found that scientists have been vastly underestimating the amount of methane humans are emitting into the atmosphere via fossil fuels. The researchers indicate that reducing fossil fuel use is a key target in curbing climate change.

what do you think?

2020-02-20 05:01:04



The climate and increased extreme weather affect our energy systems  

Climate change, with more and more storms and heat waves, also has consequences for our energy supply. An international research team has now developed a new method for calculating how extreme weather affects energy systems.

what do you think?

2020-02-20 04:40:51



10,000 times faster calculations of many-body quantum dynamics possible  

How an electron behaves in an atom, or how it moves in a solid, can be predicted precisely with the equations of quantum mechanics. These theoretical calculations agree with the results from experiments. But complex quantum systems, which contain many electrons or elementary particles can currently not be described exactly. A team has now developed a simulation method, which enables quantum mechanical calculations up to around 10,000 times faster than previously possible.

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2020-02-20 03:56:23



Carbon Taxes Would Boost Jobs across the U.S.  

Construction and manufacturing careers would rise nationwide -- Read more on ScientificAmerican.com

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2020-02-20 03:46:15



Scientists develop open-source software to analyze economics of biofuels, bioproducts  

Perennial grasses can be converted into everything from ethanol to bioplastics, but it's unclear which bioproducts hold the greatest potential. BioSTEAM, a new open-source simulation software package in Python gives scientists, engineers, biotechnology companies, and funding agencies a fast, flexible tool to analyze the economics of producing different biofuels and bioproducts -- in a matter of seconds.

what do you think?

2020-02-20 03:15:44



Why Zika virus caused most harmful brain damage to Brazilian newborns  

Researchers have found that the strain of Zika that circulated in Brazil during the microcephaly epidemic that began in 2015 was particularly damaging to the developing brain.

what do you think?

2020-02-20 02:29:13



Earthquakes disrupt sperm whales' ability to find food  

Scientists studying sperm whales have discovered earthquakes affect their ability to find food for at least a year. The research is among the first to examine the impact of a large earthquake on a population of marine mammals, and offers new insight into how top predators such as sperm whales react and adapt to a large-scale natural disturbance.

what do you think?

2020-02-20 02:21:21



Long-lasting and precise dosing of medication  

Using a mixture of oil droplets and hydrogel, medical active agents can be not only precisely dosed, but also continuously administered over periods of up to several days. The active agents inside the droplets are released at a constant rate, decreasing the risk of over- or underdosage.

what do you think?

2020-02-20 02:18:12



New graphene-based metasurface capable of independent amplitude and phase control of light  

Researchers described a new strategy of designing metamolecules that incorporates two independently controllable subwavelength meta-atoms. This two-parametric control of the metamolecule secures the complete control of both amplitude and the phase of light.

what do you think?

2020-02-20 02:07:09



What Exoplanet Is Closest to Earth?  

The nearest exoplanet discovered so far orbits the star Proxima Centauri, located 4.2 light-years from our planet.

what do you think?

2020-02-20 02:01:45



Pablo Escobar's Hippos Could Endanger Colombian Ecology  

Hippos that escaped from drug kingpin Pablo Escobar's private zoo are reproducing in the wild, and with increasing numbers could threaten ecosystems. -- Read more on ScientificAmerican.com

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2020-02-20 01:23:53



Wasp Nests Help Date Aboriginal Art  

Art created by Australian Aboriginal people used organic carbon-free pigments, but wasp nests above or below the art can be used for radiocarbon dating that supplies boundaries for the age of... -- Read more on ScientificAmerican.com

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2020-02-20 01:22:18



Shiver Yourself Thin: Can Being Cold Help You Lose Weight?   

Shivering does burn fat, but it probably won't lead to sustained weight loss.

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2020-02-20 01:05:20



Highly sensitive sensors show promise in enhancing human touch  

People rely on a highly tuned sense of touch to manipulate objects, but injuries to the skin and the simple act of wearing gloves can impair this ability. Scientists report the development of a new tactile-enhancement system based on a highly sensitive sensor. The sensor has remarkable sensitivity, allowing the wearer to detect the light brush of a feather. This crack-based sensor was inspired by a spider's slit organ.

what do you think?

2020-02-19 20:55:47



Think all BPA-free products are safe? Not so fast, scientists warn  

Using 'BPA-free' plastic products could be as harmful to human health -- including a developing brain -- as those products that contain the controversial chemical, suggest scientists.

what do you think?

2020-02-19 20:06:42



Exposure to cleaning products in first 3 months of life increases risk of childhood asthma  

New research shows that frequent exposure to common household cleaning products can increase a child's risk of developing asthma.

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2020-02-19 16:12:47



Uncovering the plastic brain of a fruitfly  

Genetic mechanisms that govern brain plasticity -- the brain's ability to change and adapt -- have been uncovered by researchers.

what do you think?

2020-02-19 15:56:36



Boys with face increased risk for traumatic brain injuries  

Researchers show that boys exhibiting inattention-hyperactivity at age 10 have a higher risk for traumatic brain injuries (TBIs) in adolescence and adulthood. Treatments to reduce these behaviors may decrease the risk for TBIs.

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2020-02-19 13:59:03



The Women's Health Pioneer You've Probably Never Heard Of  

The 19th-century black “doctress” Rebecca Davis Lee Crumpler should be on everyone’s radar -- Read more on ScientificAmerican.com

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2020-02-19 13:44:44



Racial Inequalities in Housing Extend to Flood Buyout Programs  

Whiter, wealthier communities disproportionately benefit from government programs to purchase flood-damaged homes -- Read more on ScientificAmerican.com

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2020-02-19 13:43:38



'Flapping wings' powered by the sun  

In ancient Greek mythology, Icarus' wax wings melted when he dared to fly too close to the sun. Now, researchers have made artificial wings that are actually powered by the sun. The tiny wings, which can flap even faster than those of butterflies, could someday be used in robots or devices for solar energy harvesting, the researchers say.

what do you think?

2020-02-19 12:43:03



Dog domestication during ice age  

Analysis of Paleolithic-era teeth from a 28,500-year-old fossil site in the Czech Republic provides supporting evidence for two groups of canids -- one dog-like and the other wolf-like - with differing diets, which is consistent with the early domestication of dogs.

what do you think?

2020-02-19 10:27:51



Targeting turncoat immune cells to treat cancer  

A new study has identified a mechanism by which regulatory T cells, which suppress immune responses, adapt their metabolism to thrive in the harsh microenvironment of the tumor.

what do you think?

2020-02-19 10:18:12



Fossil Fuel Emissions Contribute More Methane Than Previously Estimated  

Figuring out where methane comes from is tricky. But a new analysis suggests that human-released methane emissions are higher than we thought.

what do you think?

2020-02-19 08:44:38



Earth's glacial cycles enhanced by Antarctic sea-ice  

A 784,000 year climate simulation suggests that Southern Ocean sea ice significantly reduces deep ocean ventilation to the atmosphere during glacial periods by reducing both atmospheric exposure of surface waters and vertical mixing of deep ocean waters; in a global carbon cycle model, these effects led to a 40 ppm reduction in atmospheric CO2 during glacial periods relative to pre-industrial level, suggesting how sea ice can drive carbon sequestration early within a glacial cycle.

what do you think?

2020-02-19 08:27:05



Getting a grip: An innovative mechanical controller design for robot-assisted surgery  

Scientists designed a new type of controller for the robotic arm used in robotic surgery. Their controller combines the two distinct types of gripping used in commercially available robotic systems to leverage the advantages of both, reducing the efforts of the surgeon and providing good precision.

what do you think?

2020-02-19 07:17:26



Creating custom light using 2D materials  

Making artificial structures that emit light tailored to our specific needs is an even more attractive proposition. However, light emission in a semi-conductor only occurs when certain conditions are met. Researchers have discovered an entire class of two-dimensional materials that are the thickness of one or a few atoms. When combined together, these atomically thin crystals are capable of forming structures that emit customizable light in the desired color.

what do you think?

2020-02-19 07:15:18



Kilometers of "Dark Cable" Form the Newest Seismic Sensors  

Fiber-optic cables stretching below cities, through glaciers and along the seafloor could record earthquakes and more -- Read more on ScientificAmerican.com

what do you think?

2020-02-19 06:57:30



How to Maximize Your Workout with Push-Pull Strength Training  

Do you want a flexible, balanced, easy-to-remember workout that doesn't require spending all day at the gym? Push-pull strength training is for you! -- Read more on ScientificAmerican.com

what do you think?

2020-02-19 06:52:59



Improving the electrical and mechanical properties of carbon-nanotube-based fibers  

Researchers recently developed a technique that can be used to build carbon-nanotube-based fibers by creating chemical crosslinks. The technique improves the electrical and mechanical properties of these materials.

what do you think?

2020-02-19 05:54:56



Parlor Trick Keeps Monorails on Track  

Originally published in January 1914 -- Read more on ScientificAmerican.com

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2020-02-19 05:40:24



Late fall may be best time of year to try to conceive  

First-of-its-kind study accounts for when couples are most likely to start trying to conceive, finding couples conceive quicker in late fall and early winter, especially in southern states.

what do you think?

2020-02-19 04:36:30



Unexpected insights into the dynamic structure of mitochondria  

As power plants and energy stores, mitochondria are essential components of almost all cells in plants, fungi and animals. Until now, it has been assumed that these functions underlie a static structure of mitochondrial membranes. Researchers have now discovered that the inner membranes of mitochondria are not static, but constantly change their structure every few seconds in living cells.

what do you think?

2020-02-19 04:28:49



A new way to assess male fertility  

Current tests for male fertility include measuring the concentration and motility of spermatozoa. However, other characteristics of sperm, such as their ability to follow a chemical trail to the egg, can influence the likelihood of fertilization. Now, researchers have devised a quick and convenient microfluidic chip to assess this chemotactic response of spermatozoa, which could help provide a more complete picture of a man's fertility.

what do you think?

2020-02-19 04:08:50



How Are Exoplanets Discovered?  

The exoplanets outside our solar system are practically invisible. So, how do astronomers find them?

what do you think?

2020-02-19 03:49:25



How too much fluoride causes defects in tooth enamel  

Exposing teeth to excessive fluoride alters calcium signaling, mitochondrial function, and gene expression in the cells forming tooth enamel -- a novel explanation for how dental fluorosis, a condition caused by overexposure to fluoride during childhood, arises.

what do you think?

2020-02-19 03:15:53



New world record for conversion of solar energy to electricity using quantum dots  

Researchers have set a world record for the conversion of solar energy to electricity via the use of tiny nanoparticles called 'quantum dots'. The technology has a huge range of potential applications, including the possibility to use it as a flexible, transparent skin to power cars, planes, homes and wearable technology.

what do you think?

2020-02-19 01:40:11



Physicists Come Closer to Answering Question of Antimatter's Scarcity  

Researchers have confirmed a long-predicted key similarity between hydrogen and antihydrogen -- Read more on ScientificAmerican.com

what do you think?

2020-02-19 01:10:47



Cobalt supply can meet demand for electric vehicle and electronics batteries  

Greater use of electric vehicles might be good for the environment, but further growth hinges on continued availability of critical battery components such as cobalt. Cell phones and other electronics also depend on the element's availability. Supplies of the metal are adequate in the short term, but shortages could develop down the road if refining and recycling aren't ramped up or made more efficient, according to new research.

what do you think?

2020-02-19 01:02:05



Empathy can be detected in people whose brains are at rest  

Researchers have found that it is possible to assess a person's ability to feel empathy by studying their brain activity while they are resting rather than while they are engaged in specific tasks.

what do you think?

2020-02-18 21:26:13



The origins of roughness  

Most natural and artificial surfaces are rough: metals and even glasses that appear smooth to the naked eye can look like jagged mountain ranges under the microscope. There is currently no uniform theory about the origin of this roughness despite it being observed on all scales, from the atomic to the tectonic. Scientists suspect that the rough surface is formed by irreversible plastic deformation that occurs in many processes of mechanical machining of components such as milling.

what do you think?

2020-02-18 19:48:20



Trump Administration Begins Work on Next National Climate Report  

Climate science deniers are hoping to have a hand in the fifth assessment of climate impacts on the U.S., due out in 2022 -- Read more on ScientificAmerican.com

what do you think?

2020-02-18 19:16:38



Physicists see nuclear wobbling in one isotope of gold  

Researchers recently discovered that some nuclei wobble on their intermediate axes. 

what do you think?

2020-02-18 17:37:49






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