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Wednesday, October 1, 2014

ScienceDaily: Most Popular News

ScienceDaily: Most Popular News

Ancient human genome from southern Africa throws light on our origins

Posted: 29 Sep 2014 07:53 AM PDT

The skeleton of a man who lived 2,330 years ago in the southernmost tip of Africa tells us about ourselves as humans, and throws some light on our earliest common genetic ancestry. The man's genome was sequenced and shown to be one of the 'earliest diverged' -- oldest in genetic terms -- found to-date in a region where modern humans are believed to have originated roughly 200,000 years ago.

Simulations reveal an unusual death for ancient stars

Posted: 29 Sep 2014 06:05 AM PDT

Certain primordial stars -- between 55,000 and 56,000 times the mass of our sun, or solar masses -- may have died unusually. In death, these objects -- among the universe's first generation of stars -- would have exploded as supernovae and burned completely, leaving no remnant black hole behind.

'Cloaking' device uses ordinary lenses to hide objects across range of angles

Posted: 29 Sep 2014 05:52 AM PDT

Inspired perhaps by Harry Potter's invisibility cloak, scientists have recently developed several ways -- some simple and some involving new technologies -- to hide objects from view. The latest effort not only overcomes some of the limitations of previous devices, but it uses inexpensive, readily available materials in a novel configuration.

Human genome was shaped by an evolutionary arms race with itself

Posted: 28 Sep 2014 12:47 PM PDT

An evolutionary arms race between rival elements within the genomes of primates drove the evolution of complex regulatory networks that orchestrate the activity of genes in every cell of our bodies, researach shows. The arms race is between mobile DNA sequences known as 'retrotransposons' (a.k.a. 'jumping genes') and the genes that have evolved to control them.

New poison dart frog species discovered in Donoso, Panama

Posted: 26 Sep 2014 06:36 PM PDT

A bright orange poison dart frog with a unique call has been discovered in Donoso, Panama. Because this new frog species appears to be found in only a very small area, habitat loss and collecting for the pet trade are major threats to its existence. The authors recommend the formulation of special conservation plans to guarantee its survival.

No sign of health or nutrition problems from GMO livestock feed, study finds

Posted: 26 Sep 2014 07:10 AM PDT

A new review study finds there is no evidence in earlier scientific studies indicating that genetically engineered feed crops harmed the health or productivity of livestock and poultry, and that food products from animals consuming such feeds were nutritionally the same as products from animals that ate non-GMO feeds.

Turmeric compound boosts regeneration of brain stem cells

Posted: 25 Sep 2014 05:58 PM PDT

A bioactive compound found in turmeric promotes stem cell proliferation and differentiation in the brain, reveals new research. The findings suggest aromatic turmerone could be a future drug candidate for treating neurological disorders, such as stroke and Alzheimer's disease.

New discovery could pave way for spin-based computing: Novel oxide-based magnetism follows electrical commands

Posted: 25 Sep 2014 12:08 PM PDT

Electricity and magnetism rule our digital world. Semiconductors process electrical information, while magnetic materials enable long-term data storage. A research team has now discovered a way to fuse these two distinct properties in a single material, paving the way for new ultrahigh density storage and computing architectures.

How to make stronger, 'greener' cement: New formula could cut greenhouse-gas emissions

Posted: 25 Sep 2014 11:12 AM PDT

Concrete is the world's most-used construction material, and a leading contributor to global warming, producing as much as one-tenth of industry-generated greenhouse-gas emissions. Now a new study suggests a way in which those emissions could be reduced by more than half -- and the result would be a stronger, more durable material.

Yoga, meditation may help train brain to help people control computers with their mind

Posted: 25 Sep 2014 10:25 AM PDT

People who practice yoga and meditation long term can learn to control a computer with their minds faster and better than people with little or no yoga or meditation experience, new research by biomedical engineers shows. The research could have major implications for treatments of people who are paralyzed or have neurodegenerative diseases.

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