Researchers have taken advantage of a newly mounted laser guide star system at UC's Lick Observatory to obtain sharp, twinkle-free images of the faint dusty disks of distant massive stars. The images show that these stars form in the same way as solar-type stars inside a swirling spherical cloud.
A study published in Conservation Biology found that climate change is consistently correlated with extinction among desert bighorn sheep. The researchers identified higher temperatures and decreased precipitation as key factors contributing to the decline of these populations, which are already living on a knife's edge.
Researchers at UC Berkeley have sequenced the genomes of the most abundant members of a community of organisms in an abandoned mine, revealing four previously unknown genomes. This breakthrough in environmental genomics opens up new avenues for understanding microbial interactions and has significant implications for addressing acid mi...
Elves automates X-ray crystallography process, decreasing time to 19 minutes from days or weeks, increasing efficiency of beamlines. The software uses X-ray diffraction data to produce a 3-D layout of proteins, crucial for understanding their function and designing drugs.
A new study by University of California, Berkeley biologist Rosemary Gillespie found that Hawaiian spiders diversified to fill a wide range of habitats on the Hawaiian Islands. The research suggests that evolution plays a key role in shaping communities on these islands, similar to mainland processes.
Researchers found a periodic increase in slip rate every three years along the northern half of the central San Andreas Fault, indicating a higher probability of moderate to large quakes. This cycle is characterized by an upswing of microquakes, followed by moderate to large earthquakes six to seven times more likely to occur.
Scientists at UC Berkeley and Stanford developed a working, integrated silicon circuit that incorporates carbon nanotubes. The breakthrough allows for the creation of high-performance memory chips capable of storing orders of magnitude more data than current silicon chips.
A team of biologists at UC Berkeley has found a key gene involved in the first step of meiosis, allowing chromosomes to recognize and pair with their homologs. This discovery is crucial for understanding meiosis in humans and could lead to insights into infertility and genetic diseases.
Scientists have discovered that radioactive potassium can form an alloy with iron at high pressures and temperatures, potentially providing a significant heat source in the Earth's core. This finding could explain the missing potassium in the Earth's crust and mantle, and may help to power convection in the core.
Researchers found that a gene mutation led to a more deadly strain of tuberculosis, which spread rapidly in mice and caused increased bacterial load in organs. The mutated bacteria were able to evade the host's immune system, leading to severe infection and death.
Researchers challenge traditional explanations for explosive eruptions, suggesting that continuous fragmentation of magma can prevent explosive releases. This theory helps explain the difference in water content between effusive and explosive lava flows.
A genetic mutation that disables a protein used by HIV-1 to infect cells is prevalent in 10% of Europeans due to historical smallpox exposure. This mutation, which protects against death from smallpox, has been transferred to AIDS, slowing its progression.
Researchers discovered that mantis shrimp use fluorescent markings to enhance signaling in deep, blue ocean waters. The stomatopod's characteristic spots fluoresce yellow-green to increase visibility in the dim light.
Dark matter forms smaller clumps that resemble galaxies and globular clusters in our luminous universe. Computer simulations show these clumps have intricate substructures and dynamic lives independent of visible matter, leading to a template for the visible universe.
A team led by Reinhard Genzel reports detecting powerful infrared flares from a region just outside the supermassive black hole, indicating rapid rotation. The observed signals suggest that the black hole's fundamental orbital time is about half of the maximum spin allowed by general relativity.
A study of ancient vole fossils has provided a unique view on the evolution and adaptation of species to climate change. The findings suggest that small mammals can adapt to routine climate change, but significant evolutionary changes are only triggered by extraordinary events.
The study found that 31 soils are effectively extinct due to agricultural and land use, while six states have more than half of their rare soil series in an endangered state. The researchers argue for preserving rare and unique soils, which support rare plants and animals.
A team of scientists has resolved the long-standing mystery of hydrogen balance in the Earth's atmosphere by analyzing stratospheric air. The research reveals that the major sink for hydrogen is not as previously thought, but rather a complex interplay between atmospheric reactions and methane oxidation.
Researchers found that zinc sulphide nanoparticles change their crystal structure when wet, becoming more ordered. This effect could help identify extraterrestrial rocks and has implications for sensing technology.
The UC Berkeley Museum of Vertebrate Zoology is conducting a new wildlife survey in Yosemite National Park, following the same transect as Joseph Grinnell and Tracey Storer's landmark survey between 1914 and 1920. The team aims to gather baseline data for comparison with historic species abundance and distribution.
A recent study found that genetic differentiation among Sulfolobus islandicus populations increases with geographic distance, contradicting the prevailing theory of microbial biodiversity. This discovery suggests a more diverse microbial world than previously predicted.
Scientists at the University of California - Berkeley have developed a synthetic motor that is smaller than biological motors and can be controlled externally. The motor uses electrostatic manipulation and has potential applications in optical switching, microwave oscillators, and microfluidic devices.
RHESSI observations show that microflares, tiny explosive events on the sun, provide a significant portion of heat in the corona. The satellite's findings suggest that microflares could be key to understanding solar flares and coronal mass ejections, which affect Earth's space weather.
Research by Debra Fischer and Jeff Valenti found a correlation between star metal abundance and planet formation, with metal-rich stars having a 20% chance of harboring planets. The data suggest that a threshold metallicity exists, favoring the formation of planetary systems in stars with higher initial metal content.
Researchers argue that improving current cars and environmental rules is more cost-effective than developing hydrogen fuel cells, which require significant investment in infrastructure. Increasing fuel efficiency or raising prices can achieve similar reductions in air pollution and greenhouse gas emissions without the need for new infr...
A new technique allows for the growth of silicon nanowires and carbon nanotubes directly onto a microchip, eliminating cumbersome middle steps in sensor manufacturing. This method enables the production of ultra-sensitive biochemical sensors and early-stage disease detectors that can detect single viruses or toxic agents.
India's HIV prevalence rate is less than 1 percent, but a looming pandemic on the horizon due to shifting demographics and changing cultural values. The researchers recommend targeted prevention programs for high-risk groups, such as prostitutes and men who have sex with men, and offer circumcision as an additional avenue of prevention.
Researchers analyzed data from the World Health Organization and found that countries with quicker control measures had lower fatality rates and slower epidemics. The study suggests that better control measures, such as rapid hospitalization and isolation of cases, are more effective than differences in infectivity or virulence.
Fossilized skulls from Ethiopia's Afar region date back to 160,000 years, showcasing the earliest known fossils of modern humans. The discovery fills a major gap in the human fossil record and supports the theory that modern humans evolved in Africa.
Identical twins who communicated once a month or more lived significantly longer than those with less frequent contact, outliving fraternal twins by nearly two years. Frequent social interaction among identical twins appears to contribute to their longevity.
The device detects cell viability directly and instantly, measuring electrical resistance changes in milliseconds after exposure to a toxic agent. It offers a rapid alternative to traditional fluorescent dye assays for detecting biochemical attacks or monitoring drug toxicity.
Researchers at UC Berkeley created a microbial factory that can produce artemisinin, an effective antimalarial drug, using yeast, wormwood, and bacterial genes. The process reduces the production of artemisinin to just a few chemical alterations, making it cost-effective for global use.
Recent RHESSI detection suggests gamma-ray bursts originate from highly structured magnetic fields, stronger than neutron star surfaces. This finding implies a dramatic shift in understanding the physics behind these explosive events.
A new 3D map of local space reveals the Sun at the center of an irregular cavity, surrounded by a dense wall of gas. The map suggests that interlocking cavities and tunnels were created by supernovas or strong stellar winds.
Researchers found that half of the ozone is lost through unknown mechanisms in summer, but absorbed by trees in winter. The study suggests that understanding natural processes is crucial for developing scientifically-based air quality management policy.
Researchers discovered that 3,3'-diindolylmethane (DIM) inhibits the proliferation of human prostate cancer cells by acting as a powerful anti-androgen. DIM, found in cruciferous vegetables like broccoli, decreases PSA levels and blocks the effects of androgen on cancer cells.
Researchers have developed microgel polymer beads that can be engineered to break apart in acidic conditions, releasing vaccine antigens on the surface of immune cells. This technique avoids destroying protein antigens with stomach acids, making it a promising approach for future vaccines and gene therapy.
A team of UC Berkeley scientists resolves a long-standing puzzle in earth science by clarifying the depth of the continental lithosphere. By re-examining earthquake-generated seismic waves, they determine that the boundary between the lithosphere and asthenosphere lies at 200-250 kilometers.
Researchers have developed gallium nitride nanotubes that exhibit optical properties similar to carbon nanotubes but with a transparent structure. These tubes hold promise as chemical sensors due to their ability to attach organic molecules, making them useful for microfluidic applications.
Astronomers discovered a galaxy without a visible central bulge but with a massive black hole, challenging previous assumptions about the formation of supermassive black holes. The galaxy's black hole has a mass approximately 10,000 to 100,000 times that of the sun.
Scientists estimate a significant increase in low-energy cosmic ray flux, leading to enhanced heating and ionization in diffuse interstellar gas clouds. This finding implies the production of more complex molecules than previously thought, with potential implications for the origin of life.
The THEMIS mission aims to pinpoint the location of substorms that produce auroral eruptions. Five satellites will track the motion of plasma along the sun-Earth line, providing insights into the processing of solar wind energy. The mission has the potential to resolve a long-standing problem in understanding space weather.
Researchers at UC Berkeley used a custom-made sensor to study the link between nerve cell activation and oxygen levels in brain tissue. The study found that initial decreases in oxygen levels precede increased neural activity, promising advancements in brain imaging techniques.
Scientists have created a 3D map of the protein universe, organizing over 500 common motifs and revealing clusters that resemble cigars. This map helps visualize the relationships among all proteins in nature, shedding light on evolutionary changes and potential applications in biomedical research.
A staged development concept for Yucca Mountain aims to allow decisions based on latest available information, avoiding rigid timelines. A pilot stage will study performance before storing large amounts of radioactive waste.
Computer simulations can examine the performance of representative structures under blast loadings, exploring design alternatives. Researchers aim to distribute blast resistance capabilities more broadly across infrastructure, addressing technology areas through component testing and simulation.
Scientists have found that Bacillus spore size changes with environmental conditions, potentially allowing for rapid detection of anthrax. The discovery could enable a test to identify anthrax spores in seconds to minutes.
A new study found that genetically modified crops in India produced yields up to 80% greater than non-Bt counterparts, while also reducing pesticide use. This breakthrough has implications for small-scale farmers in developing nations who struggle with crop losses due to pests.
A study of 97 healthy men found that semen quality decreased with age, particularly in sperm motility. The researchers discovered a 0.7% decrease in sperm motility per year, impacting fertility from age 22 to 80.
The study found that physician groups use only 32% of recommended care management processes, leaving many patients without optimal care. External incentives from health plans and large purchasers can encourage the adoption of these processes.