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Saturday, November 29, 2014

ScienceDaily: Most Popular News

ScienceDaily: Most Popular News

DNA survives critical entry into Earth's atmosphere

Posted: 26 Nov 2014 11:41 AM PST

The genetic material DNA can survive a flight through space and re-entry into Earth's atmosphere -- and still pass on genetic information. Scientists obtained these astonishing results during an experiment on the TEXUS-49 research rocket mission.

'Eye of Sauron' provides new way of measuring distances to galaxies

Posted: 26 Nov 2014 10:27 AM PST

Scientists have developed a new way of measuring precise distances to galaxies tens of millions of light years away, using the W. M. Keck Observatory near the summit of Mauna Kea in Hawaii. The method is similar to what land surveyors use on Earth, by measuring the physical and angular, or 'apparent', size of a standard ruler in the galaxy, to calibrate the distance from this information.

'Off switch' for pain discovered: Activating the adenosine A3 receptor subtype is key to powerful pain relief

Posted: 26 Nov 2014 10:26 AM PST

A way to block a pain pathway in animal models of chronic neuropathic pain has been discovered by researchers, suggesting a promising new approach to pain relief.

Dogs hear our words and how we say them

Posted: 26 Nov 2014 09:43 AM PST

When people hear another person talking to them, they respond not only to what is being said -- those consonants and vowels strung together into words and sentences -- but also to other features of that speech -- the emotional tone and the speaker's gender, for instance. Now, a report provides some of the first evidence of how dogs also differentiate and process those various components of human speech.

How does the brain react to virtual reality? Completely different pattern of activity in brain

Posted: 24 Nov 2014 01:29 PM PST

Neurophysicists studying a key brain region where Alzheimer's disease begins have discovered how the brain processes virtual reality. 'The pattern of activity in a brain region involved in spatial learning in the virtual world is completely different than in the real world,' said the professor of physics, neurology, and neurobiology.

Selenium compounds boost immune system to fight against cancer

Posted: 24 Nov 2014 09:54 AM PST

Cancer types such as melanoma, prostate cancer and certain types of leukemia weaken the body by over-activating the natural immune system. Researchers have now demonstrated that selenium -- naturally found in, e.g., garlic and broccoli -- slows down the immune over-response. In the long term, this may improve cancer treatment.

Marker polyps do not cause cancer, experts say

Posted: 21 Nov 2014 08:18 AM PST

Although serrated polyps usually are associated with colorectal cancer, it turns out that such polyps are themselves not dangerous, according to a study.

Nail stem cells prove more versatile than press-ons

Posted: 21 Nov 2014 07:29 AM PST

There are plenty of body parts that don't grow back when you lose them. Nails are an exception, and a new study reveals some of the reasons why. A team of researchers has identified a new population of nail stem cells, which have the ability to either self-renew or undergo specialization or differentiation into multiple tissues.

Wheat in diet: Study on health impact of wheat challenges Stone Age myths and costly diets, providing you go whole grain

Posted: 19 Nov 2014 05:45 PM PST

A review of the current evidence on the dietary and health impact of whole grain cereal consumption finds that many of the myths attributed to wheat-free diets are just that – myths, and that whole grains such as wheat are beneficial for the majority of people.

Obese much more likely to die in car crashes than normal weight drivers, U.S. study finds

Posted: 21 Jan 2013 04:20 PM PST

Obese drivers are significantly more likely to die in a road traffic collision than people of normal weight, according to a new U.S. study.

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