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Anthropology News |
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ScienceDaily: Latest Science News
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Breaking science news and articles on global warming, extrasolar planets, stem cells, bird flu, autism, nanotechnology, dinosaurs, evolution -- the latest discoveries in astronomy, anthropology, biology, chemistry, climate & environment, computers, engineering, health & medicine, math, physics, psychology, technology, and more -- from the world's leading universities and research organizations.
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Superconducting hydrogen? Researchers model three hydrogen-dense metal alloys
Physicists have long wondered whether hydrogen could be transformed into a metal or a superconductor -- the elusive state in which electrons can flow without resistance. They have speculated that certain pressure and temperature conditions could achieve these goals. Now high-pressure researchers have modeled three hydrogen-dense metal alloys and found pressure and temperature trends associated with the superconducting state -- a huge boost in understanding how this abundant material could be harnessed.
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New insight into reprogramming of cell fate
A discovery brings new insight into how cells are reprogrammed and a greater understanding of how the environment, or factors like nutritional signals, can interact with our genes to affect health. As an embryo develops, cells acquire a particular fate, for example becoming a nerve or skin cell. The findings pinpoint a protein called AID as being important for complete cellular reprogramming in mammals. In addition, these findings may advance the field of regenerative medicine, by potentially enhancing our ability to guide the reversal of cell fate, and pave the way for novel therapeutics.
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First evidence that the brain?s native dendritic cells can muster an immune response
The human brain is a delicate organ, robustly defended. A thick skull shields it from any direct exposure to the outside world, and the blood-brain barrier keeps out any foreign substances that are circulating within. New research shows that the brain may have its own specialized immune defenses, too.
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New software provides 3-D views of arteries in catheterization lab
New software allows for 3-D images of the heart's arteries during cardiac catheterization. Still in the testing phase, this technology may provide more information on the width and length of artery blockages, while exposing patients to less dye and radiation.
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Environmental change impacts Oklahoma rivers
Biodiversity in freshwater systems is impacted as much or more by environmental change than tropical rain forests, according to new research.
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Couples can overdo being supportive
Couples having problems are often advised to be more supportive of each other, but a series of University of Iowa studies shows that too much support -- or the wrong kind of support -- may actually do more harm than good.
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Barefoot running: How humans ran comfortably and safely before the invention of shoes
Scientists have found that those who run barefoot, or in minimal footwear, tend to avoid "heel-striking," and instead land on the ball of the foot or the middle of the foot. In so doing, these runners use the architecture of the foot and leg and some clever Newtonian physics to avoid hurtful and potentially damaging impacts, equivalent to two to three times body weight, that shod heel-strikers repeatedly experience.
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How blood flow force protects blood vessels
Most people know that exercise protects against heart attack and stroke, but researchers have spent 30 years unraveling the biochemistry behind the idea. Researchers have now revealed new details of how athletic hearts push blood through arteries with greater force and the force-sensitive chain reaction that protects arteries.
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'Squeaker' catfish communicate across generations
It has been thought that young fish, lacking well-developed hearing organs, could not perceive the sounds made by their larger, older relatives. Now, researchers have used a combined fish tank and sound-proof chamber to show for the first time that catfish of all ages can communicate with one another.
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Biochemical profile may help diagnose, determine aggressiveness of prostate cancer
Magnetic resonance spectroscopy -- which analyzes the biochemistry rather than the structure of tissues -- may someday be able both to pinpoint the precise location of prostate cancer and to determine the tumor's aggressiveness, information that could help guide treatment planning. Researchers report how spectroscopic analysis of the biochemical makeup of prostate glands accurately identified the location of tissue confirmed to be malignant by conventional pathology.
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Beyond sunglasses and baseball caps
A new study found that UV-blocking contact lenses can reduce or eliminate the effects of the sun's harmful UV radiation.
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Prayer increases forgiveness, study shows
Is it possible that directed prayer might spark forgiveness in those doing the praying -- and in the process preserve relationships?
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Rotting fish heads: Novel studies of decomposition shed new light on our earliest fossil ancestry
Decaying corpses are usually the domain of forensic scientists, but palaeontologists have discovered that studying rotting fish sheds new light on our earliest ancestry.
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Fat tissue may be a source of valuable blood stem cells, study says
Bone marrow is a leading source of adult stem cells, which are increasingly used for research and therapeutic interventions, but extracting the cells is an arduous and often painful process. Now, researchers have found evidence that fat tissue, known as adipose tissue, may be a promising new source of valuable and easy-to-obtain regenerative cells called hematopoietic stem and progenitor cells.
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Lopsided fish show that symmetry is only skin deep
Putting function before form, members of the Perissodinus genus of fish have developed a hugely lopsided jaw that provides a distinct feeding advantage. Researchers describe how these scale-eating fish, called cichlids, develop mouths directed either to the left or the right -- enabling them to feed on the opposite side of their prey.
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