ScienceDaily: Latest Science News

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• Looking Different 'Helps Animals To Survive'
• Scientists Find Cells Responsible For Bladder Cancer's Spread
• 'Motion Picture' Of Past Warming Paves Way For Snapshots Of Future Climate Change
• What Makes Stem Cells Tick?
• Innovative Method To Detect Genetic Causes Of Complex Diseases Identified
• Children With Positive Outlooks Are Better Learners
• Chemists Discover Ozone-boosting Reaction: Newfound Chemistry Should Be Added To Atmospheric Models, Experts Say
• Ambitious New Strategies Proposed For AIDS Vaccine Research
• Primate Archaeology Sheds Light On Human Origins
• Unraveling How Cells Respond To Low Oxygen
• Ozone Depletion Reduces Ocean Carbon Uptake
• Distinctive Gene Expression In Brains Of Relapsing Heroin-addicted Rats
• Earth's Most Prominent Rainfall Feature Creeping Northward
• Colon Cancer May Yield To Cellular Sugar Starvation
• Gene Transcribing Machine Takes Halting, Backsliding Trip Along The DNA
• Stroke Doubles Patients' Risk Of Hip Or Thigh Fracture
• No Daily Or Weekly Pattern To Earthquakes In Western U.S.
• Cognitive Decline Not Linked To Socioeconomic Status In Elderly, According To New Study
• Psychological Factors Help Explain Slow Reaction To Global Warming

Looking Different 'Helps Animals To Survive' Posted: 09 Aug 2009 02:00 PM PDT In the animal kingdom, everything is not as it seems. Individuals of the same species can look very different from each other -- what biologists term "polymorphism." Sometimes the number of distinct visible forms -- "exuberant polymorphisms" -- in a single animal population can reach double figures. But why? Scientists have now developed computer models that may help to explain how this level of variation arises and persists.

Scientists Find Cells Responsible For Bladder Cancer's Spread Posted: 09 Aug 2009 02:00 PM PDT Scientists have tracked down a powerful set of cells in bladder tumors that seem to be primarily responsible for the cancer's growth and spread using a technique that takes advantage of similarities between tumor and organ growth. The findings could help scientists develop new ways of finding and attacking similar cells in other types of cancer.

'Motion Picture' Of Past Warming Paves Way For Snapshots Of Future Climate Change Posted: 09 Aug 2009 02:00 PM PDT By accurately modeling Earth's last major global warming -- and answering pressing questions about its causes -- climatologist are unraveling the intricacies of the kind of abrupt climate shifts that may occur in the future.

What Makes Stem Cells Tick? Posted: 09 Aug 2009 02:00 PM PDT Investigators have made the first comparative, large-scale phosphoproteomic analysis of human embryonic stem cells (hESCs) and their differentiated derivatives.

Innovative Method To Detect Genetic Causes Of Complex Diseases Identified Posted: 09 Aug 2009 02:00 PM PDT Computational biologists have developed an analytical technique to detect the multiple genetic variations that contribute to complex disease syndromes such as diabetes, asthma and cancer, which are characterized by multiple clinical and molecular traits.

Children With Positive Outlooks Are Better Learners Posted: 09 Aug 2009 02:00 PM PDT Teaching children how to be more resilient along with regular classroom instruction can improve children's outlook on life, curb depression and boost grades, according to a new research.

Chemists Discover Ozone-boosting Reaction: Newfound Chemistry Should Be Added To Atmospheric Models, Experts Say Posted: 09 Aug 2009 08:00 AM PDT Burning of fossil fuels pumps chemicals into the air that react on surfaces such as buildings and roads to create photochemical smog-forming chlorine atoms, scientists report in a new study. The newfound chemistry should be added to atmospheric models, researchers say.

Ambitious New Strategies Proposed For AIDS Vaccine Research Posted: 09 Aug 2009 08:00 AM PDT Researchers believe conventional vaccine strategies should not be the only avenue explored in the development of an effective AIDS vaccine. Based on studying simian immunodeficiency viruses in African nonhuman primates, they propose an additional new approach to the AIDS vaccine research agenda. Unraveling how African nonhuman primates adapt to HIV-like viruses may lead to vaccine.

Primate Archaeology Sheds Light On Human Origins Posted: 09 Aug 2009 08:00 AM PDT Archaeologists are now establishing a discipline devoted to the history of tool use in non-human primate species in order to better understand human evolution.

Unraveling How Cells Respond To Low Oxygen Posted: 09 Aug 2009 08:00 AM PDT Scientists have elucidated how the stability of the REDD1 protein is regulated. The REDD1 protein is a critical inhibitor of the mTOR signaling pathway, which controls cell growth and proliferation.

Ozone Depletion Reduces Ocean Carbon Uptake Posted: 09 Aug 2009 08:00 AM PDT The Southern Ocean plays an important role in mitigating climate change because it acts as a sink of atmospheric carbon dioxide. Most current models predict that the strength of the Southern Ocean carbon dioxide sink should increase as atmospheric carbon dioxide rises, but observations show that this has not been the case.

Distinctive Gene Expression In Brains Of Relapsing Heroin-addicted Rats Posted: 09 Aug 2009 08:00 AM PDT A group of genes whose expression is significantly altered following exposure to drug paraphernalia after an enforced "cold-turkey" period have been identified. Researchers studied gene expression in the brains of heroin-addicted rats, identifying those genes that may be involved in precipitating a relapse.

Earth's Most Prominent Rainfall Feature Creeping Northward Posted: 09 Aug 2009 02:00 AM PDT The rain band near the equator that determines the supply of freshwater to nearly a billion people throughout the tropics and subtropics has been creeping north for more than 300 years. If the band continues to migrate at just less than a mile a year, which is the average for all the years it has been moving north, then some Pacific islands near the equator may be starved of freshwater by midcentury or sooner.

Colon Cancer May Yield To Cellular Sugar Starvation Posted: 09 Aug 2009 02:00 AM PDT Scientists have discovered how two cancer-promoting genes enhance a tumor's capacity to grow and survive under conditions where normal cells die. The knowledge, they say, may offer new treatments that starve cancer cells of a key nutrient -- sugar. However, the scientists caution that research does not suggest that altering dietary sugar will make any difference in the growth and development of cancer.

Gene Transcribing Machine Takes Halting, Backsliding Trip Along The DNA Posted: 09 Aug 2009 02:00 AM PDT Cells have nanoscale protein machines that perform the first step in gene expression, gliding smoothly along the DNA and translating it into RNA. Or so scientists thought. Scientists now show that the real process is replete with long pauses and backsliding as the machine -- RNA polymerase II -- tries to negotiate the nucleosomes that tightly wrap DNA in the nucleus.

Stroke Doubles Patients' Risk Of Hip Or Thigh Fracture Posted: 09 Aug 2009 02:00 AM PDT Stroke survivors have about twice the risk of breaking a hip or thigh bone as people who haven't had a stroke. Risk of hip/femur fracture is even higher in younger patients, women and within three months of a stroke.

No Daily Or Weekly Pattern To Earthquakes In Western U.S. Posted: 09 Aug 2009 02:00 AM PDT Daily traffic and noisy machines mask the vibrations caused by earthquakes, making seismic stations unable to detect many M >1 earthquakes. As a result, more earthquakes appear to happen on Sundays and late at night when people and machines are at rest, according to a new study of the apparent daily and weekly periodicity of seismic activity.

Cognitive Decline Not Linked To Socioeconomic Status In Elderly, According To New Study Posted: 09 Aug 2009 02:00 AM PDT New research suggests that for seniors age 70 and older, socioeconomic status does not play a major role in the brain's continued ability to function. However, seniors who have never been married and widowers seem to perform more poorly as they age.

Psychological Factors Help Explain Slow Reaction To Global Warming Posted: 07 Aug 2009 02:00 PM PDT While most Americans think climate change is an important issue, they don't see it as an immediate threat, so getting people to "go green" requires policymakers, scientists and marketers to look at psychological barriers to change and what leads people to action, according to a task force of the American Psychological Association.

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