A new study found that consumers often quit using products that would be beneficial for them in the long run because they experience a short period of pessimism during their initial encounter with skill-based products as varied as knitting needles and mobile devices.

Scientists in China have shown how a rather wide spectrum of light -- a rainbow of radiation -- can be trapped in a single structure. They propose to do this by sending the light rays into a self-similar-structured dielectric waveguide -- essentially a light pipe with a cladding of many layers.

Black tea, a Southern staple and the world's most consumed beverage, may contain higher concentrations of fluoride than previously thought, which could pose problems for the heaviest tea drinkers, researchers say.

Drugs commonly taken for a variety of common medical conditions including insomnia, allergies, or incontinence negatively affect the brain causing long term cognitive impairment in older African-Americans, according to a new study which reported that taking one anticholinergic significantly increased an individual's risk of developing mild cognitive impairment and taking two of these drugs doubled this risk.

Researchers have shown that ordinary water -- without any additives -- does more than just quench thirst. It has some other unexpected, physiological effects. It increases the activity of the sympathetic -- fight or flight -- nervous system, which raises alertness, blood pressure and energy expenditure.

With high-speed DNA sequencing, scientists can look at slight genetic differences among humans, great apes and other primates to arrive at new estimates of when different ancestral groups split . [More]



Hominidae - Human - DNA sequencing - DNA profiling - DNA

Shifty eyes long have been thought to signify a person's problem telling the truth. Now a group of researchers are taking that old adage to a new level. Educational psychologists are using eye-tracking technology to pioneer a promising alternative to the polygraph for lie detection.

Shifty eyes long have been thought to signify a person's problem telling the truth. Now a group of researchers are taking that old adage to a new level. Educational psychologists are using eye-tracking technology to pioneer a promising alternative to the polygraph for lie detection.

Scientists in the UK are conducting research into how biological scaffolding can pave the way for off- the-shelf tissue transplants.

Scientists in the UK are conducting research into how biological scaffolding can pave the way for off- the-shelf tissue transplants.