Carrying a full cup of coffee from the kitchen to the dining room can be precarious for a sleepy-eyed caffeine addict who might accidentally send a wave of java sloshing over the rim. But add a bit of foam to the top and the trip becomes easier. Scientists have found that just a few layers of bubbles can significantly dampen the sloshing motion of liquid.
A chemical found in garlic can kill bacteria that cause life-threatening lung infections in people with cystic fibrosis, research suggests. The study is the first to show that the chemical, known as allicin, could be an effective treatment against a group of infectious bacteria that is highly resistant to most antibiotics.
Scientists have created a high-energy mid-infrared laser powerful enough to create shining filaments in the air. Such devices could be used to detect chemical substances in the atmosphere.
At least five mass extinction events have profoundly changed the history of life on Earth. But a new study led by researchers at the Univ. of Gothenburg shows that plants have been very resilient to those events. For over 400 million years, plants have played an essential role in almost all terrestrial environments and covered most of the world's surface.
A spark from a lightning bolt, interstellar dust or a subsea volcano could have triggered the very first life on Earth. But what happened next? Life can exist without oxygen; but without plentiful nitrogen to build genes, life on the early Earth would have been scarce. The ability to use atmospheric nitrogen to support more widespread life was thought to have appeared roughly 2 billion years ago.
Rivers and streams could be a major source of antibiotic resistance in the environment. The discovery comes following a study on the Thames river by scientists at the Univ. of Warwick and the Univ. of Exeter. The study found that greater numbers of resistant bacteria exist close to some waste water treatment works, and that these plants are likely to be responsible for at least half of the increase observed.
“Antiaromatic compounds” is what chemists call a class of ring molecules which are extremely instable. Because they exist for mere split seconds, they can only be detected by extremely demanding, ultra-fast methods. Researchers from the Cluster of Excellence RESOLV at Ruhr-Univ. Bochum have succeeded in isolating the antiaromatic fluorenyl cation at extremely low temperatures in water ice.
How do you make nickel look and behave like copper? A team of scientists at Yale Univ. has done just that by developing a novel technique to artificially alter a material’s atomic properties by substantially modifying the orbital properties of electrons. The electrons can also be tunably configured in orbital patterns with unique magnetic, superconductive and optical properties.
Mice genetically deficient in serotonin, a crucial brain chemical implicated in clinical depression, are more vulnerable than their normal littermates to social stressors, according to a Duke Univ. study. Following exposure to stress, the serotonin-deficient mice also did not respond to a standard antidepressant, fluoxetine (Prozac), which works by boosting serotonin transmission between neighboring neurons.
Brigham Young Univ. biologist Jonathan Alder has a startling secret he doesn’t freely share: he knows when most of us are going to die. Okay, he doesn’t know exactly the day or time, but he has a pretty good idea, thanks to his research on tiny biological clocks attached to our chromosomes. These DNA end caps, called telomeres, are the great predictors of life expectancy: the shorter your telomeres, the shorter your lifespan.
Planetary scientists have calculated that there are hundreds of billions of Earth-like planets in our galaxy which might support life. The new research, led by The Australian National Univ., made the finding by applying a 200 year old idea to the thousands of exoplanets discovered by the Kepler space telescope.
Firing off a string of action snapshots like a sports photographer at a NASCAR race, NASA's Hubble Space Telescope captured the rare occurrence of three of Jupiter's largest moons racing across the banded face of the gas-giant planet: Europa, Callisto and Io.
Nearly all studies used to promote biofuels as climate-friendly alternatives to petroleum fuels are flawed and need to be redone, according to a Univ. of Michigan researcher. Once the erroneous methodology is corrected, the results will likely show that policies used to promote biofuels actually make matters worse when it comes to limiting net emissions of climate-warming carbon dioxide gas.
A team of scientists has identified the complex process by which materials are shaped and ultimately dissolved by surrounding water currents. The study, conducted by researchers at New York Univ. (NYU)’s Courant Institute of Mathematical Sciences and Florida State Univ., appears in the Journal of Fluid Mechanics.
The more scientists study pigeons, the more they learn how their brains operate in ways not so different from our own. In a new study from the Univ. of Iowa, researchers found that pigeons can categorize and name both natural and manmade objects. These birds categorized 128 photographs into 16 categories, and they did so simultaneously.
While the mysterious, unseen forces magnets project are now (mostly) well understood, they can still occasionally surprise us. For instance, thin films of cobalt have been observed to spontaneously switch their poles: something that typically doesn’t happen in the absence of an external magnetic field. Physicists at NIST and the Univ. of Maryland have measured this phenomenon on the largest scale yet.
Birds are unwitting masters of fluid dynamics: They manipulate airflow each time they flap their wings, pushing air in one direction and moving themselves in another. Two New York Univ. researchers have taken inspiration from avian locomotion strategies and created a pump that moves fluid using vibration instead of a rotor.
Researchers at Virginia Commonwealth Univ. and universities in China and Japan have discovered a new structural variant of carbon called "penta-graphene", a very thin sheet of pure carbon that has a unique structure inspired by a pentagonal pattern of tiles found paving the streets of Cairo.
From manufacturing life-saving biopharmaceuticals to producing energy-efficient biofuels, the cost-effective production of proteins will be essential to revolutionizing the future of health care and energy. For years, scientists have turned to yeast as a quick and inexpensive way to mass-produce proteins for a variety of useful products. Now Northwestern Univ. has found a way to gather more protein without making the yeast produce more.
As a grape slowly dries and shrivels, its surface creases, ultimately taking on the wrinkled form of a raisin. Similar patterns can be found on the surfaces of other dried materials, as well as in human fingerprints. While these patterns have long been observed in nature, and more recently in experiments, scientists have not been able to come up with a way to predict how such patterns arise in curved systems, such as microlenses.
Moderate consumption of alcohol has been associated with health benefits in some, but not all, studies. Researchers at the Yale Univ. School of Medicine may have found an explanation, in part, for why non-smokers might benefit from a glass of wine.
Human taste receptors are specialized to distinguish several distinct compounds: sugars taste sweet, salts taste salty, and acidic compounds taste sour. Now a new study from Massachusetts Institute of Technology finds that the worm Caenorhabditis elegans has taken its powers of detection a step further: The worm can taste hydrogen peroxide, triggering it to stop eating the potentially dangerous substance.
One of nature’s fascinating questions is how zebras got their stripes. A team of life scientists led by Univ. of California, Los Angeles has found at least part of the answer: The amount and intensity of striping can be best predicted by the temperature of the environment in which zebras live.
The American public and U.S. scientists are light-years apart on science issues. And 98% of surveyed scientists say it's a problem that we don't know what they're talking about. Scientists are far less worried about genetically modified food, pesticide use, and nuclear power than is the general public, according to matching polls of both the general public and the country's largest general science organization.
The health-promoting perks of wine have attracted the spotlight recently, leaving beer in the shadows. But scientists are discovering new ways in which the latter could be a more healthful beverage than once thought. They’re now reporting that a compound from hops could protect brain cells from damage, and potentially slow the development of disorders such as Alzheimer’s and Parkinson’s diseases.