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Comment by Dr. Krishna Kumari Challa on February 22, 2014 at 9:40am

Vaccines Endure Hot Weather without Damage
An anti-meningitis campaign in Benin has delivered more than 150,000 doses with no losses from excess heat
http://www.scientificamerican.com/article/vaccines-endure-hot-weath...

Comment by Dr. Krishna Kumari Challa on February 22, 2014 at 9:29am

New sitting risk: Disability after 60

If you're 60 and older, every additional hour a day you spend sitting is linked to doubling the risk of being disabled -- regardless of how much moderate exercise you get, reports a new Northwestern Medicine® study. The study is the first to show sedentary behavior is its own risk factor for disability, separate from lack of moderate vigorous physical activity. In fact, sedentary behavior is almost as strong a risk factor for disability as lack of moderate exercise.

Being sedentary was almost as strong a risk factor for disability as lack of moderate vigorous activity. "It means older adults need to reduce the amount of time they spend sitting, whether in front of the TV or at the computer, regardless of their participation in moderate or vigorous activity,"

http://esciencenews.com/articles/2014/02/20/new.sitting.risk.disabi...

Comment by Dr. Krishna Kumari Challa on February 22, 2014 at 9:15am

Comment by Dr. Krishna Kumari Challa on February 21, 2014 at 6:49am

Buried amid the complexity of the human brain, a newly described scaffold carries important messages from one place to another. A map of the scaffold, which reveals intricate connections made by bundles of nerve fibers called white matter tracts, could help explain why some brain injuries are particularly devastating.
scaffold offers new view of the brain
Neural map may explain why some injuries are worse than others
https://www.sciencenews.org/article/white-matter-scaffold-offers-ne...

Comment by Dr. Krishna Kumari Challa on February 21, 2014 at 6:47am

http://researcher.watson.ibm.com/researcher/files/us-bennetc/QInfWe...
Quantum entanglement

Comment by Dr. Krishna Kumari Challa on February 21, 2014 at 6:42am

Questions raised about new method for making stem cells
Research reports in late January garnered attention for showing that making stem cells just required dipping adult cells in acid (SN: 2/22/14, p. 6). But Japan’s RIKEN Center for Developmental Biology, where the lead scientist works, has begun an investigation of the findings, according to reports in Nature, the Wall Street Journal and other publications.

The reported investigation comes after online commenters discovered potentially manipulated images in the two papers published in the Jan. 30 Nature, and several scientists have had difficulty replicating the work.

http://www.ipscell.com/stap-new-data/
https://www.sciencenews.org/blog/science-ticker/questions-raised-ab...

Comment by Dr. Krishna Kumari Challa on February 20, 2014 at 6:16am

Asian Elephants Console Each Other When in Distress
Using trunks and vocalizations, elephants reassure one another when distressed
http://www.scientificamerican.com/article/asian-elephants-console-e...

Comment by Dr. Krishna Kumari Challa on February 20, 2014 at 6:10am

Prions Are Key to Preserving Long Term Memories
The famed protein chain reaction that made mad cow disease a terror may be involved in helping to ensure that our recollections don't fade
http://www.scientificamerican.com/article/prions-are-key-to-preserv...

Comment by Dr. Krishna Kumari Challa on February 19, 2014 at 9:43am

A Happy Life May Not Be a Meaningful Life
Feeling happy was strongly correlated with seeing life as easy, pleasant, and free from difficult or troubling events. Happiness was also correlated with being in good health and generally feeling well most of the time. However, none of these things were correlated with a greater sense of meaning. Feeling good most of the time might help us feel happier, but it doesn’t necessarily bring a sense of purpose to our lives.
Money, contrary to popular sayings, can indeed buy happiness. Having enough money to buy what one needs in life, as well as what one desires, were also positively correlated with greater levels of happiness. However, people don’t see their lives as more meaningful when they have lot sof money.
Perhaps instead of saying that “money doesn’t buy happiness,” we ought to say instead that “money doesn’t buy meaning.”
More broadly, the findings in the study suggest that pure happiness is about getting what we want in life—whether through people, money, or life circumstances. Meaningfulness, in contrast, seems to have more to do with giving, effort, and sacrifice. It is clear that a highly meaningful life may not always include a great deal of day-to-day happiness. And, the study suggests, obsession with happiness may be intimately related to a feeling of emptiness, or a life that lacks meaning.
http://www.scientificamerican.com/article/a-happy-life-may-not-be-a...

Comment by Dr. Krishna Kumari Challa on February 19, 2014 at 9:03am

Why Einstein changed his view on the universe.
Albert Einstein accepted the modern cosmological view that the universe is expanding long after his contemporaries Until 1931, physicist Albert Einstein believed that the universe was static.. An urban legend attributes this change of perspective to when American astronomer Edwin Hubble showed Einstein his observations of redshift in the light emitted by far away nebulae -- today known as galaxies. But the reality is more complex. The change in Einstein's viewpoint, in fact, resulted from a tortuous thought process. Now, in an article published in EPJ H, Harry Nussbaumer from the Institute of Astronomy at ETH Zurich, Switzerland, explains how Einstein changed his mind following many encounters with some of the most influential astrophysicists of his generation. In 1917 Einstein applied his theory of general relativity in the universe, and suggested a model of a homogenous, static, spatially curved universe. However, this interpretation has one major problem: If gravitation was the only active force, his universe would collapse -- an issue Einstein addressed by introducing the cosmological constant.

He then fiercely resisted the view that the universe was expanding, despite his contemporaries' suggestions that this was the case. For example, in 1922, Russian physicist Alexander Friedman showed that Einstein's equations were viable for dynamical worlds. And, in 1927, Georges Lemaître, a Belgian astrophysicist from the Catholic University of Louvain, concluded that the universe was expanding by combining general relativity with astronomical observations. Yet, Einstein still refused to abandon his static universe.

However, in an April 1931 report to the Prussian Academy of Sciences, Einstein finally adopted a model of an expanding universe. In 1932 he teamed up with the Dutch theoretical physicist and astronomer, Willem de Sitter, to propose an eternally expanding universe which became the cosmological model generally accepted until the middle of the 1990s. To Einstein's relief these two models no longer needed the cosmological constant. - Agencies

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