Theoretical physicist Robert J. Scherrer proposes a model that explains dark matter and dark energy as two sides of the same coin, using an exotic form of energy called scalar fields. This unifying idea avoids previous problems and could potentially explain the mysterious phenomena.
Astrophysicists have found a solution to the long-standing problem of dwarf galaxies in supercomputer simulations, validating the cold dark matter theory. The new simulations suggest that small dwarf galaxies could have been more massive in the past and formed stars before being consumed by larger galaxies.
A two-week study found that consuming daily dark chocolate with high flavonoid content improved blood vessel function in participants. The study, led by Mary Engler, showed a significant increase in flow-mediated dilation in the high-flavonoid group, indicating better vascular health and a lower risk of heart disease.
A study by University of Washington researchers exposes the existence of two distinct circadian clocks within the mammalian brain, one tied to an internal schedule and another influenced by external light-dark cycles. The discovery sheds new light on how artificial day-night cycles can disrupt physiological rhythms in mammals.
The CDMS II experiment has narrowed the search for WIMPs, a type of dark matter particle. The results show that the interaction rate of a WIMP with ordinary matter should be less than one interaction every 25 days per kilogram of germanium.
A study suggests that debris from the gobbled-up Sagittarius dwarf galaxy may be 'smoking gun' for detecting dark matter's WIMPs. The combination of WIMPs from the Milky Way and Sagittarius could produce a distinct pattern on the DAMA detector, confirming their existence.
Astronomers have detected a lensed quasar more than twice as wide as any previously reported, offering insights into dark matter and its distribution. The discovery provides evidence for the presence of massive galaxy clusters, which can be used to study dark matter.
The American Association for the Advancement of Science names WMAP satellite and Sloan Digital Sky Survey as key discoveries confirming a dark, expanding universe dominated by 73% dark energy. Scientists also identified genes increasing mental illness risk and reported global warming impacts.
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.
Researchers at UCLA created a 30-cm diameter plasma laser by applying a nonuniform magnetic field. Meanwhile, scientists have made rapid advances in detecting dark matter using weak gravitational lensing experiments. A paper also examines the emerging behavior of complex systems in electronic bidding on online auction sites like eBay.
The study provides strong support for the popular cold dark matter model of the universe, suggesting that galaxies are surrounded by massive, three-dimensional halos. The team measured the shapes of over 1.5 million distant galaxies using weak gravitational lensing, revealing that dark matter halos extend far beyond visible stars.
The team reconstructed a mass map of the galaxy cluster using NASA/ESA Hubble Space Telescope data, tracing dark matter's distribution with respect to galaxies. The study reveals that dark matter clumps together in certain regions, supporting the idea that clusters assemble through the merger of smaller groups.
Physicists at the University of California, Irvine have discovered superweakly interacting massive particles (superWIMPs) that may constitute up to one-quarter of the universe's mass. These new particles are predicted to be stable and could provide an alternative explanation for dark matter.
A 2002 NASA study found a significant decline in coral cover and species diversity after the 'black water' event, which was caused by a bloom of microscopic marine plants. The dark water reduced sunlight absorption, affecting the ecosystem.
Researchers conclude dark energy is the dominant form of energy in the universe, contradicting observations of distant supernovae. The accelerating expansion of the universe can be explained by the presence of negative pressure in a vacuum, supporting the existence of dark energy.
A study found that dark grape juice reduces iron availability by 67%, while light-colored juices increase uptake. Limiting grape juice or alternating with other juices is recommended for infants and toddlers to prevent iron-deficiency anemia.
Scientists using Whipple Observatory gamma-ray telescope discover energetic gamma-ray flares from active galaxies, revealing relativistic jets and compact emission regions. The study also holds promise to reveal nature of 'dark matter' and 'dark energy', which dominate universe's mass budget.
Researchers from Newcastle University successfully classified 70% of River Ouseburn water samples by measuring natural fluorescence, which could aid in detecting organic pollutants. The 'glowing' technique uses spectrophotometry to fingerprint dissolved organic matter in rivers.
A study published in Biochemistry found significant alterations in white matter tissue of Alzheimer's patients, suggesting a potential initiating step for the disease. White matter degeneration may be caused by a disease of oligodendrocytes, leading to axon damage and cognitive impairments.
Researchers found that male lions are intimidated by longer manes, while females prefer darker-maned males. Darker manes also correlate with higher testosterone levels, which may be an advantage for attracting mates and defending territories. Despite this, there is no correlation between mane length and temperature regulation.
Astronomers found that most comets disappear after their first pass through the solar system, but recent modelling suggests the number of dormant comets is far too low to accommodate predicted numbers. Dr Foot proposes mirror matter as a possible explanation for the missing comets.
Astronomers have found evidence for dark dwarf galaxies that support the theory of cold dark matter. The study analyzed gravitational lensing effects on distant galaxies, revealing the presence of hundreds of invisible dwarf galaxies surrounding large galaxies.
Researchers using galaxy cluster surveys can measure the equation of state of dark energy, which would provide clues about its nature and origin. By studying scaling relations and X-ray emission, scientists hope to determine the essence of dark energy.
Researchers from Ohio State University have successfully measured the mass of a gravitational microlens in a dim binary star system 6,500 light-years away. This technique could be used to detect dark matter within our galaxy and help explain the missing mass of the universe.
Astronomers have shed new light on dark matter distribution by tracing it closely to galaxy patterns. They found that dark matter is distributed in a parallel pattern to galaxies and makes up about seven times more mass than ordinary matter.
Researchers from the Lawrence Livermore National Laboratory have detected a dark matter object in the Milky Way using microlensing light data and spectroscopy. The team measured the mass, distance, and velocity of the MACHO, a small star with a mass between 5% and 10% of the sun's mass at a distance of 600 light-years.
A team of astronomers has directly observed a Dark Matter object, confirming the theory that it consists of small, faint stars in galaxies like our Milky Way. The detection was made using the Hubble Space Telescope and the European Southern Observatory's Very Large Telescope.
Researchers have detected a massive compact halo object, or MACHO, using gravitational microlensing event data from the Hubble Space Telescope and European Southern Observatory's Very Large Telescope. The object is estimated to be 5-10% the mass of the sun and is thought to comprise up to 50% of the Milky Way's dark matter content.
Astronomers have detected the imprint of neutral atoms on light from a distant quasar, providing a glimpse into the early universe. The observation reveals that complex atoms such as carbon, nitrogen, oxygen, and silicon were formed in the first stars and quasars, constraining the timing of the universe's reionization.
The universe consists mostly of mysterious dark matter and dark energy, which make up 95% of its mass. Ordinary matter accounts for only 5%, a finding confirmed by observations of the cosmic microwave background.
Researchers used Diffusion Tensor Imaging (DTI) to track water molecules in the brain, revealing damage to white matter that affects message transmission within neurons. The study links this damage to neurocognitive deficits in detoxified chronic alcoholics.
Lawrence Schulman proposes a new scientific spin on science fiction, suggesting the possibility of reverse arrow systems where broken eggs re-form and timeline runs backwards. He uses statistical computer modeling to show that such systems could exist in regions with dark matter.
Researchers use 'Cosmic Triangle' to plot evidence for accelerated universe expansion and high mass density of dark energy. The findings rule out models with low or negative mass density, pointing towards a flat universe dominated by dark energy.
Researchers at Berkeley's Space Sciences Laboratory have concluded that atmospheric holes in satellite imagery are caused by instrument noise, not small comets. The study analyzes raw data from the Polar spacecraft and shows that dark pixel clusters are consistent with instrumental noise.
Qaisar Shafi's research proposes two distinct components of dark matter, with the 'cold' component residing in galaxy haloes and the 'hot' component gravitationally trapped by large-scale structures. This new understanding could guide experimental work and incorporate dark matter into models of the universe.
A team of astronomers used a supercomputer to simulate the growth of cosmic structure in a region comparable to the entire observable Universe. The simulation revealed patterns of dark matter walls and filaments, as well as massive voids and giant galaxy clusters.
Researchers Mark Boslough and Randy Gladstone suggest that entry of ordinary meteoroids can form dark spots similar to those observed by satellites, contradicting a theory of frequent small comet bombardment. Their study provides evidence for the existence of high-altitude plumes generated by meteors.
Astronomers have found far more dwarf galaxies than expected in a survey of just 2% of data from the Parkes radio telescope. The discovery suggests that dwarfs may be 'crumbs' left over when bigger galaxies formed and could provide clues about the distribution of dark matter.
Case Western Reserve University physicist Glenn Starkman has received a four-year, $200,000 NSF grant to study the shape of the universe by mapping temperature fluctuations throughout space. He aims to develop new techniques to detect dark matter, which is believed to comprise much of the mass in the universe.
Researchers have found evidence of a 'missing' form of ordinary matter, known as baryonic matter, that was thought to be needed to form the cosmos billions of years ago. The findings suggest that this matter was spread throughout intergalactic space in a diffuse gas of hydrogen and helium atoms.