Cancer cells crowded tightly together suddenly surrender their desire to spread, and this change of heart is related to a cellular pathway that controls organ size. These two observations are reported by researchers at Georgetown Lombardi Comprehensive Cancer Center in Oncogene.
As telescopes of ever-greater power scan the cosmos looking for life, knowing where to look, and where not to waste time looking, will be of great value. New research by Univ. of Washington astronomers describes possible planetary systems where a gravitational nudge from one planet with just the right orbital configuration and tilt could have a mild to devastating effect on the orbit and climate of another, possibly habitable world.
NASA's Hubble Space Telescope has the best evidence yet for an underground saltwater ocean on Ganymede, Jupiter's largest moon. The subterranean ocean is thought to have more water than all the water on Earth's surface. Identifying liquid water is crucial in the search for habitable worlds beyond Earth and for the search of life as we know it.
In 1941, Russian physicist Andrey Kolmogorov developed a theory of turbulence that has served as the basic foundation for our understanding of this important naturally occurring phenomenon. Kolmogorov’s theory has been interpreted to imply that transitions from one state of turbulence to another must be a smooth evolution. However, new research disproves this interpretation of Kolmogorov’s theory.
Lithium-ion batteries have enabled many of today’s electronics, from portable gadgets to electric cars. But much to the frustration of consumers, none of these batteries last long without a recharge. Now scientists report in ACS Nano the development of a new, “green” way to boost the performance of these batteries: with a material derived from silk.
Martian colonists could use an innovative new technique to harvest energy from carbon dioxide thanks to research pioneered at Northumbria Univ. The research proposes a new kind of engine for producing energy based on the Leidenfrost effect, a phenomenon which happens when a liquid comes into near contact with a surface much hotter than its boiling point.
A long anticipated El Nino has finally arrived. But for drought-struck California, it's too little, too late, meteorologists say. The National Weather Service on Thursday proclaimed the phenomenon is now in place. It's a warming of a certain patch of the central Pacific that changes weather patterns worldwide, associated with flooding in some places, droughts elsewhere, a generally warmer globe and fewer Atlantic hurricanes.
With the most unpredictable U.K. general election looming in modern times, how can big data be used to understand how elections are covered by the media? New research has, for the first time, analyzed over 130,000 online news articles to find out how the 2012 U.S. presidential election played out in the media.
The concept of randomness appears across scientific disciplines, from materials science to molecular biology. Now, theoretical chemists at Princeton Univ. have challenged traditional interpretations of randomness by computationally generating random and mechanically rigid arrangements of 2-D hard disks, such as pennies, for the first time.
Tiny parasitic hookworms infect nearly half a billion people worldwide, almost exclusively in developing countries, causing health problems ranging from gastrointestinal issues to cognitive impairment and stunted growth in children. By sequencing and analyzing the genome of one particular hookworm species, Caltech researchers have uncovered new information that could aid the fight against these parasites.
Researchers have, for the first time, successfully converted adult human skin cells into neurons of the type that regulate appetite, providing a patient-specific model for studying the neurophysiology of weight control and testing new therapies for obesity. To make the neurons, human skin cells were first genetically reprogrammed to become induced pluripotent stem (iPS) cells.
Light behaves both as a particle and as a wave. Since the days of Einstein, scientists have been trying to directly observe both of these aspects of light at the same time. Now, scientists at EPFL have succeeded in capturing the first-ever snapshot of this dual behavior.
Researchers have long sought an efficient way to untangle DNA in order to study its structure under a microscope. Now, chemists and engineers at KU Leuven have devised a strikingly simple and effective solution: They inject genetic material into a droplet of water and use a pipet tip to drag it over a glass plate covered with a sticky polymer.
Everyday experience and psychological studies alike tell us there are two different types of extroverts: The gregarious “people-persons” and the ambitious “go-getters”. A new study shows that these overlapping yet distinct personalities have commensurately overlapping yet distinct signatures in the anatomy of the brain.
It started with a trip to the basement of the American Museum of Natural History in New York to inspect preserved animal hides. Later, Georgia Institute of Technology researchers built a wind tunnel about 2 ft tall, complete with a makeshift eye. By putting both steps together, the team discovered that 22 species of mammals are the same: their eyelash length is one-third the width of their eye.
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.