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142,737 articles from ScienceDaily

Was Ability To Run Early Man's Achilles Heel?

The earliest humans almost certainly walked upright on two legs but may have struggled to run at even half the speed of modern man, new research suggests. They proposes that if early humans lacked an Achilles tendon, as modern chimps and gorillas do, then their ability to run would have been severely compromised.


Customized Virus Kills Brain Tumor Stem Cells That Drive Lethal Cancer

A tailored virus destroys brain tumor stem cells that resist other therapies and cause lethal re-growth of cancer after surgery, a mouse study shows. The virus was tested against the most aggressive brain tumor which originates in the glial cells that surround and support neurons. This type of tumor is highly resistant to radiation and chemotherapy and so invasive that surgery almost never...

How Vitamin C Stops Cancer

Nearly 30 years after Nobel laureate Linus Pauling famously and controversially suggested that vitamin C supplements can prevent cancer, a team of Johns Hopkins scientists have shown that in mice, at least, vitamin C -- and potentially other antioxidants -- can indeed inhibit the growth of some tumors, just not in the manner suggested by years of investigation.

Smallest Piece Of Art Ever Printed Could Herald Ultra-Tiny Nanowires, Biosensors And Optics For Future Chips

IBM researchers in collaboration with scientists from the ETH Zurich have demonstrated a new, efficient and precise technique to "print" at the nanoscale. The method, which allows the scientists to place individual particles precisely where they want them, could advance the development of nanoscale biosensors, ultra-tiny lenses that can bend light inside future optical chips, and the fabrication...

Education Linked To Risk Of Cancer Death

A new American Cancer Society study finds having at least some education beyond high school is strongly associated with a decreased risk of cancer death. For all cancer sites combined, death rates among white and black men with the lowest (0-8 years) level of education were about three times higher than those with the highest (17+ years) level of education.

Hot Ice To Lubricate Artificial Joints

A recent simulation has shown that thin layers of ice could persist on specially treated diamond coatings at temperatures well above body temperature, which could make ice-coated-diamond films an ideal coating for artificial heart valves, joint replacements, and wear-resistant prosthetics.

Magnets Can Boost Production Of Ethanol For Fuel

In a finding that could reduce the cost of ethanol fuel, researchers in Brazil report success in using low frequency magnetic waves to significantly boost the amount of ethanol produced through the fermentation of sugar. While bioethanol (ethanol produced from corn and other plants) is a promising alternative to fossil fuels, it currently is expensive and inefficient to make. An intensive research...

How Human Body Fights Off African Parasite

Trypanosoma are a nasty class of single-celled parasites that cause serious, even fatal, diseases in human and animals. Two species cause sleeping sickness, a disease that threatens all of sub--Saharan Africa. There's a catch though: one parasite, Trypanosoma brucei brucei (T. b. brucei), infects animals but seems to spare humans, and scientists haven't quite understood why. A team of researchers...

Synthesizing Gas, Making Energy

A way to convert natural gas into raw materials for the chemical industry and generate power as a by-product could lead to more environmental benign manufacturing processes. Making synthesis gas -- a blend of hydrogen and carbon monoxide -- is a key step in turning natural gas or biomass into bulk chemicals, such as acetic acid, methanol, oxygenated alcohols, isocyanates, and ammonia, which are...

United States Continues To Have Highest Level Of Health Spending

Researchers report that the United States continues to spend the most on health care when compared to other Organization for Economic Cooperation and Development countries. Health care prices and higher per capita incomes are major factors for higher U.S. spending, according to a new study. Compared to the average OECD country in 2004, the United States has fewer health resources—physicians,...

New Options In 'Personalized' Cancer Treatment And Prevention

Molecular diagnostics promises to provide new strategies for tailoring therapies to fit the needs of each cancer patient's unique biology. Researchers can now fine-tuned the treatment of a number of different cancer types, including lung and ovarian, based on the genetic profile of the patient's tumors.

Pediatricians May Miss Developmental Delays, But Parents Can Help

A simple questionnaire requiring no more than 15 minutes of a parent's time before or after a doctor's appointment is credited with a 224-percent increase in referrals of one-year-old and two-year-old children with mild developmental delays in a yearlong study. The study also indicated that physicians had a greater difficulty identifying delays at 12 months compared to 24 months. The authors noted...

A Balanced Memory Network

Ever wonder how much information we put in our heads? The answer: a lot. For starters, a typical vocabulary is 50,000-250,000 words. And then there are all the little details that stretch back decades -- the house we grew up in, the time we spilled orange juice on our test back in third grade, the solution to a quadratic equation (for some of us). So where do we put it all? If we had hard drives...

Personal Chaos In HIV Patients' Lives May Be A Barrier To Regular Medical Care, Study Shows

Unstable and unpredictable lifestyles are significant factors in determining access to health care among low-income, HIV-positive people, a new study has found. The study found that when HIV patients lead chaotic lives -- meaning they are disorganized or experience too many unexpected events -- that chaos can act as a barrier to regular medical care. The researchers also developed a new scale to...

A Step Toward Tissue-engineered Heart Structures For Children

Infants and children receiving artificial heart-valve replacements face several repeat operations as they grow, since the since the replacements become too small and must be traded for bigger ones. Researchers have now developed a solution: living, growing valves created in the lab from a patient's own cells. They can now make pulmonary valves through tissue engineering.

Cell Phone Use Not Linked To Brain Cancer, Study Suggests

Mobile phones have not been found to be associated with any biological or adverse health effects, according to the UK's largest investigation into the possible health risks from mobile telephone technology. The six year research program has found no association between short term mobile phone use and brain cancer.

Computer Poetry Pushes The Genre Envelope

What happens to poetry in the Digital Age? In one of the first academic works in the field, a Swedish researcher has studied how the ability of the computer to combine words, images, movement and sounds is impacting both writing and reading.

Confuse Your Customer, Then Explain Simply: They Buy It

An article in the Journal of Consumer Research examines the effectiveness of a new confusion-based sales technique called "disrupt-then-reframe." The researchers found that by presenting a confusing sales pitch to consumers and then restating the pitch in a more familiar way, they were able to increase sales of a candy bar in a supermarket, increase students' willingness to pay to join a student...

Corals Added To IUCN Red List Of Threatened Species For First Time

For the first time in history, the IUCN Red List of Threatened Species includes ocean corals in its annual report of wildlife going extinct. A comprehensive study of marine life sponsored by Conservation International concluded that three species of corals unique to the Galapagos Islands could soon disappear forever. The 2007 IUCN Red List designates two of the corals as Critically Endangered,...