Jumat, 01 Juli 2016

ScienceDaily: Top Science News

ScienceDaily: Top Science News

A bewildering form of sand dune discovered on Mars

Posted: 30 Jun 2016 12:02 PM PDT

Some of the wind-sculpted sand ripples on Mars are a type not seen on Earth, and their relationship to the thin Martian atmosphere provides new clues about the atmosphere's history.

First signs of healing in the Antarctic ozone layer

Posted: 30 Jun 2016 11:50 AM PDT

Scientists have found the first 'fingerprints of healing' for the Antarctic ozone hole. The September ozone hole has shrunk by more than 4 million square kilometers since 2000, when ozone depletion was at its peak.

Microbes, nitrogen and plant responses to rising atmospheric carbon dioxide

Posted: 30 Jun 2016 11:45 AM PDT

Plants can grow faster as atmospheric carbon dioxide concentrations increase, but only if they have enough nitrogen or partner with fungi that help them get it, according to new research.

Treating autoimmune disease without harming normal immunity

Posted: 30 Jun 2016 11:44 AM PDT

With potentially major implications for the future treatment of autoimmunity and related conditions, scientists have found a way to remove the subset of antibody-making cells that cause an autoimmune disease, without harming the rest of the immune system. They studied an autoimmune disease called pemphigus vulgaris, a condition in which a patient's own immune cells attack a protein called desmoglein-3 that normally adheres skin cells.

Harnessing an innate repair mechanism enhances success of retinal transplantation

Posted: 30 Jun 2016 11:44 AM PDT

Cell replacement therapies hold promise for many age-related diseases, but efforts to bring treatments to patients have not been very successful -- in large part because the newly derived cells can't integrate efficiently into tissues affected by the ravages of aging. This is poised to change. Researchers have harnessed a naturally occurring anti-inflammatory mechanism that repaired the eye and significantly enhanced the success of retinal regenerative therapies in mice. The results could be particularly significant for macular degeneration.

A little spark for sharper sight

Posted: 30 Jun 2016 11:09 AM PDT

Stimulating the brain with a mild electrical current can temporarily sharpen vision without glasses or contacts, researchers have found.

Fast fluency: Can we identify quick language learners?

Posted: 30 Jun 2016 11:05 AM PDT

Ever wonder why some people seem to learn new languages faster? The secret might lie in the brain activity they generate while relaxing.

Pea plants demonstrate ability to 'gamble' -- a first in plants

Posted: 30 Jun 2016 10:58 AM PDT

Pea plants can demonstrate sensitivity to risk -- namely, that they can make adaptive choices that take into account environmental variance, an ability previously unknown outside the animal kingdom. In the study, pea plants were grown with their roots split between two pots, thus facing the decision of which pot to prioritize.

Hubble captures vivid auroras in Jupiter’s atmosphere

Posted: 30 Jun 2016 07:23 AM PDT

Astronomers are using the NASA/ESA Hubble Space Telescope to study auroras -- stunning light shows in a planet's atmosphere -- on the poles of the largest planet in the Solar System, Jupiter.

In times of great famine, microalgae digest themselves

Posted: 30 Jun 2016 07:22 AM PDT

The molecular mechanisms which microalgae apply in order to switch from rapid cell division to growth-arrest during times of acute nutrient deficiency, researchers have determined.

Thinking 'I can do better' really can improve performance, study finds

Posted: 30 Jun 2016 07:20 AM PDT

Telling yourself 'I can do better,' can make you do better at a given task, a study has found. Over 44,000 people took part in an experiment to discover what motivational techniques really worked. The researchers tested which physiological skills would help people improve their scores in an online game.

Erasing unpleasant memories with a genetic switch

Posted: 30 Jun 2016 06:20 AM PDT

Dementia, accidents, or traumatic events can make us lose the memories formed before the injury or the onset of the disease. Researchers have now shown that some memories can also be erased when one particular gene is switched off.

Shape-changing 'smart' material: Heat, light stimulate self-assembly

Posted: 30 Jun 2016 06:20 AM PDT

Researchers have developed a unique, multifunctional smart material that can change shape from heat or light and assemble and disassemble itself. This is the first time researchers have been able to combine several smart abilities, including shape memory behavior, light-activated movement and self-healing behavior, into one material.

A 6,000 year old telescope without a lens: Prehistoric tombs enhanced astronomical viewing

Posted: 29 Jun 2016 07:18 PM PDT

Astronomers are exploring what might be described as the first astronomical observing tool, potentially used by prehistoric humans 6,000 years ago. They suggest that the long, narrow entrance passages to ancient stone, or 'megalithic', tombs may have enhanced what early human cultures could see in the night sky, an effect that could have been interpreted as the ancestors granting special power to the initiated.

It's not easy being green: What colors tell us about galaxy evolution

Posted: 29 Jun 2016 07:17 PM PDT

Scientists may have answered why green galaxies are rare in our universe and why their color could reveal a troubled past.

Zika virus identified in brain, placenta tissue, strengthening link to birth defects

Posted: 29 Jun 2016 07:17 PM PDT

Zika virus has been detected in the brain tissue of a deceased two-month-old baby in Brazil who was diagnosed with microcephaly, in the brain tissue of two newborns who died shortly after birth, and in the placenta tissue of two fetuses that were spontaneously aborted, new research reveals.

Penguin population could drop 60 percent by end of the century

Posted: 29 Jun 2016 06:48 AM PDT

Approximately 30 percent of current Adélie penguin colonies may be in decline by 2060, researchers predict, and approximately 60 percent may be in decline by 2099. The declines are associated with warming -- many regions of Antarctica have warmed too much and further warming is no longer positive for the species.
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