Scientists have discovered the brightest quasar in the early universe, powered by the most massive black hole yet known at that time. The discovery of this quasar, named SDSS J0100+2802, marks an important step in understanding how quasars, the most powerful objects in the universe, have evolved from the earliest epoch, only 900 million years after the Big Bang, which is thought to have happened 13.7 billion years ago.
Sea levels from New York to Newfoundland jumped up about four inches in 2009 and 2010 because...
Since the beginning of recorded time, humans have used materials found in nature to improve...
By zapping the air with a pair of powerful laser bursts, researchers at the Univ. of Arizona have created highly focused pathways that can channel electricity through the atmosphere. The new technique can potentially direct an electrical discharge up to 10 m away or more, shattering previous distance records for transmitting electricity through air. It also raises the intriguing possibility of one day channeling lightning with laser power.
A Univ. of Arizona-led team of physicists has discovered how to change the crystal structure of graphene with an electric field, an important step toward the possible use of graphene in microprocessors that would be smaller and faster than current, silicon-based technology.
An electrode designed like a pomegranate—with silicon nanoparticles clustered like seeds in a tough carbon rind—overcomes several remaining obstacles to using silicon for a new generation of lithium-ion batteries, say its inventors at Stanford Univ. and the SLAC National Accelerator Laboratory.
Univ. of Arizona agricultural and biosystems engineering associate professor Jeong-Yeol Yoon and cardiology professor Dr. Marvin Slepian are testing nanotextured surfaces to improve how cardiovascular implant devices are attached in the body. The goal is to create a selectively sticky surface, favoring endothelial cell attachment, without favoring platelet attachment.
The first solids to form in the solar system contain unusual isotopic signatures that show a nearby supernova injected material within ~100,000 years of their formation. That supernova, caused from the cataclysmic death of a star, could have even triggered the birth of the sun.
Retinal implants have not lived up to their potential, argues a joint University of Arizona-German research team, until now.
Using ultra-fast laser pulses, a team of researchers led by the Univ. of Arizona has made the first detailed observation of how energy travels through diamonds containing nitrogen-vacancy centers—promising candidates for a variety of technological advances such as quantum computing.
Scientists have discovered an unknown mechanism that establishes polarity in developing nerve cells. According to the research at Univ. of Arizona, two different versions of the same signaling protein tell a nerve cell which end is which. The findings could help improve therapies for spinal injuries and neurodegenerative diseases.
The structures of most of the two million proteins in the human body are still unknown. A new algorithm developed by Lawrence Berkeley National Laboratory scientists solves the convoluted shapes of large molecules by using images of numerous individual samples, all caught simultaneously in a split-second flash of X-rays from a free-electron laser.
A new chemical process can transform waste sulfur into a lightweight plastic that may improve batteries for electric cars, reports a University of Arizona-led team. The new plastic has other potential uses, including optical uses. The team has successfully used the new plastic to make lithium-sulfur batteries.
Cheating is a behavior not limited to humans, animals and plants. Even microscopically small, single-celled algae do it, a team of University of Arizona researchers has discovered. Their research adds to the emerging view that microbes often have active social lives. Unlocking the secrets of those lives could help control serious threats to ecological or human health.
Scientists have pieced together the sequence of events of the farthest touchdown a man-made spacecraft has ever made on an alien world. Their work in tracking the bounces, wobbles, and skids the probe made before coming to rest on Titan reveals new clues about the Saturn moon’s surface and helps plan future missions to moons and planets.
Using the world’s fastest laser pulses, which can freeze the ultrafast motion of electrons and atoms, physicists have caught the action of molecules breaking apart and electrons getting knocked out of atoms. Their most recent accomplishment is a real-time series of snapshots documenting what happens to an oxygen molecule when it pops apart after absorbing too much energy to maintain the stable bond between its two atoms.
A new study has found that climate-prediction models are good at predicting long-term climate patterns on a global scale, but lose their edge when applied to time frames shorter than three decades and on sub-continental scales.
Mo Ehsani, a University of Arizona professor of civil engineering, has designed a new, lightweight underground pipe he says could transform the pipeline construction industry. Instead of conventional concrete or steel, the new pipe consists of a central layer of lightweight plastic honeycomb, similar to that used in the aerospace industry, sandwiched between layers of resin-saturated carbon fiber fabric.
By synchronizing 98 tiny cameras in a single device, electrical engineers from Duke University and the University of Arizona have developed a prototype camera that can create images with unprecedented detail. The camera's resolution is five times better than 20/20 human vision over a 120 degree horizontal field.
Astronomers at Arizona State University have found an exceptionally distant galaxy, ranked among the top 10 most distant objects currently known in space. Light from the recently detected galaxy left the object about 800 million years after the beginning of the universe, when the universe was in its infancy.
Graphite, more commonly known as pencil lead, could become the next big thing in the quest for smaller, less power-hungry electronics. University of Arizona physicists are making discoveries that may advance electronic circuit technology.
Despite a century of research, memory storage in the brain has remained mysterious. Evidence points to synaptic connection strengths among brain neurons, but synaptic components are short-lived and yet memories can last lifetimes.Recent has demonstrated a plausible mechanism for encoding synaptic memory in microtubules, major components of the structural cytoskeleton within neurons.
On Wednesday, Jan. 18, astronomers, physicists and scientists from related fields will convene in Tucson, Ariz. from across the world to discuss an endeavor that only a few years ago would have been regarded as nothing less than outrageous: the construction of a virtual telescope powerful enough to see to the center of our Milky Way.
A slight change in molecular structure introduced by genetic engineering gives crop-protecting proteins called Bt toxins a new edge in overcoming resistance of certain pests, a University of Arizona-led team of researchers reports.
A Princeton University-led study is the first involving humans to show that yawning frequency varies with the season, a disparity that indicates that yawning could serve as a method for regulating brain temperature.
Researchers have found that melting ice sheets contributed much more to rising sea levels than thermal expansion of warming ocean waters during the Last Interglacial Period. The results further suggest that ocean levels continue to rise long after warming of the atmosphere levels off.
Physicists at the Univ. of Arizona have proposed a way to translate the elusive magnetic spin of electrons into easily measurable electric signals. The finding is a key step in the development of computing based on spintronics, which doesn't rely on electron charge to digitize information.
Meteorites collected from a British Columbia meteoroid strike in British Columbia 11 years ago are among history’s best preserved. They reveal that asteroids not only hold the stuff of life, like carbon and amino acids—the building blocks of protein—they also are wildly different in the level of amino acids they have. And astronomers now have a theory as to why.
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