bilimselkonular science
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The scalding-hot sea that supposedly covered the early Earth may in fact never have existed, according to a new study by Stanford University researchers who analyzed isotope ratios in 3.4 billion-year-old ocean floor rocks. Their findings suggest that the early ocean was much more temperate and that, as a result, life likely diversified and spread [...]
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Physicists have developed a new metamaterial structure that successfully demonstrates reverse Cerenkov radiation. They have directly observed a reverse shock wave of light in a specially tailored structure known as a left-handed metamaterial.
Although it was first predicted over forty years ago, this is the first unambiguous experimental demonstration of the effect. The research is reported [...]
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A diet high in fructose increases the risk of developing high blood pressure (hypertension), according to a paper being presented at the American Society of Nephrology`s 42nd Annual Meeting and Scientific Exposition in San Diego, California. The findings suggest that cutting back on processed foods and beverages that contain high fructose corn syrup (HFCS) may [...]
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Perceived poor managerial leadership increases not only the amount of sick leave taken at a workplace, but also the risk of sickness amongst employees later on in life. The longer a person has had a "poorer" manager, the higher his or her risk of for example suffering a heart attack within a ten-year period, according [...]
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Were dinosaurs "warm-blooded" like present-day mammals and birds, or "cold-blooded" like present day lizards? The implications of this simple-sounding question go beyond deciding whether or not you`d snuggle up to a dinosaur on a cold winter`s evening.
In a study published this week in the journal PLoS ONE, a team of researchers, including Herman Pontzer, Ph.D., [...]
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Like yoga for office drones, cells do have coping strategies for stress. Heat, lack of nutrients, oxygen radicals — all can wreak havoc on the delicate internal components of a cell, potentially damaging it beyond repair. Proteins called HSPs (heat shock proteins) allow cells to survive stress-induced damage. Scientists have long studied how HSPs work [...]
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When a fetus is smaller than expected for the number of weeks of pregnancy, due to associated problems like a poorly developed heart, health concerns as severe as brain damage can result.
The condition, known as Intra-uterine growth restriction (IUGR), prompts doctors to use ultrasound to track a baby`s health and determine the best time for [...]
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NASA scientists studying the origin of life have reproduced uracil, a key component of our hereditary material, in the laboratory. They discovered that an ice sample containing pyrimidine exposed to ultraviolet radiation under space-like conditions produces this essential ingredient of life.
Pyrimidine is a ring-shaped molecule made up of carbon and nitrogen and is the basic [...]
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The swine flu (H1N1) pandemic has received extensive media coverage this year. The World Health Organization, in addition to providing frequent updates about cases of infection and death tolls, recommends hyper vigilance in daily hygiene such as frequent hand washing or sneezing into the crook of our arms. News reports at all levels, from local [...]
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