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Stephen orders America's fighting men and women to stay safe, stay strong and come home soon.

Former UK Prime Minster Tony Blair warns world leaders they may pay a heavy price in history if they fail to tackle global warming.

Experiments prompted by a 2008 surprise from NASA's Phoenix Mars Lander suggest that soil examined by NASA's Viking Mars landers in 1976 may have contained carbon-based chemical building blocks of...

The higher up a male bonobo is placed in the social hierarchy, the greater his mating success is with female bonobos, researchers have found. But even males who are not so highly placed still have a...

Researchers have developed a new type of pump for drug-delivery patches that might use arrays of "microneedles" to deliver a wider range of medications than now possible with conventional patches.

Survival rates in heart failure patients with reduced levels of vitamin D are lower than in patients with normal levels. This is the finding of a major study carried out in the Netherlands.

A doctoral student who discovered a new species of bee in Toronto has completed a study of 84 species of sweat bees in Canada. Nineteen of these species are new to science -- never before identified...

Uninsured minority pedestrians hit by cars are at a significantly higher risk of death than their insured white counterparts, even if the injuries sustained are similar, new research suggests.

A mix of chemicals borrowed from plants with tiny tubes of carbon can spontaneously create tiny, self-repairing solar cells.

A group of Danish rocket enthusiasts trying to launch a dummy 30km into the sky abort the mission when a valve on their rocket freezes up.

Scientists have determined the fine-scale genetic structure of the first animal to show an evolutionary response to rapid climate change.

As anyone who has ever struggled to keep his or her eyes open after a big meal knows, eating can induce sleepiness. New research in fruit flies suggests that, conversely, being hungry may provide a...

Only about one in every six Americans who have ever been overweight or obese loses weight and maintains that loss, according to researchers.

Move over, Sunbelt. The New North is coming through, a geographer predicts in a new book. As worldwide population increases by 40 percent over the next 40 years, sparsely populated Canada,...

Iron deficiency is a relatively common nutritional disorder that affects more than one third of the general population, and is often associated with chronic diseases such as inflammatory bowel...

With a loud roar and mighty column of flame, NASA and ATK Aerospace Systems successfully completed a two-minute, full-scale test of the largest and most powerful solid rocket motor designed for...

The Hubble space telescope returns to view one of its favourite subjects - a giant stellar explosion first seen from Earth in 1987.

Female fruit flies will have sex more frequently if they think there is more food around, and a new study has explained how this happens.

A major international study is to examine whether shame is a key part of the experience of being poor. It will look at whether being poor necessarily results in low self esteem or feelings of shame...

Biologists have discovered that a gene critical for programmed cell death is also important in the loss of adult stem cells, a finding that could help to improve the health and well-being of patients...

A tiny optical device built into a silicon chip has achieved the slowest light propagation on a chip to date, reducing the speed of light by a factor of 1,200.