Σάββατο, 14 Ιουνίου 2014

ScienceDaily: Top Science News

ScienceDaily: Top Science News


Cracks in Pluto's moon could indicate it once had an underground ocean

Posted: 13 Jun 2014 12:28 PM PDT

If the icy surface of Pluto's giant moon Charon is cracked, analysis of the fractures could reveal if its interior was warm, perhaps warm enough to have maintained a subterranean ocean of liquid water, according to a new study.

Aromatic flavors of haze on Saturn's largest moon, Titan, recreated

Posted: 13 Jun 2014 12:28 PM PDT

Scientists have created a new recipe that captures key flavors of the brownish-orange atmosphere around Saturn's largest moon, Titan. The recipe is used for lab experiments designed to simulate Titan's chemistry. With this approach, the team was able to classify a previously unidentified material discovered in the moon's smoggy haze.

Processed red meat linked to higher risk of heart failure, death in men

Posted: 12 Jun 2014 02:46 PM PDT

Men who regularly eat moderate amounts of processed red meat such as cold cuts (ham/salami) and sausage may have an increased risk of heart failure incidence and a greater risk of death from heart failure. Researchers recommend avoiding processed red meat and limiting the amount of unprocessed red meat to one to two servings a week or less.

Forging new ground in oil forensics: Deepwater Horizon Oil on shore even years later, after most has degraded

Posted: 12 Jun 2014 12:30 PM PDT

Years after the 2010 Deepwater Horizon Oil spill, oil continues to wash ashore as oil-soaked 'sand patties,' persists in salt marshes abutting the Gulf of Mexico, and questions remain about how much oil has been deposited on the seafloor. Scientists have developed a unique way to fingerprint oil, and have successfully identified Macondo Well oil, even after most of it has degraded.

New computer program aims to teach itself everything about any visual concept

Posted: 12 Jun 2014 12:27 PM PDT

In today's digitally driven world, access to information appears limitless. But when you have something specific in mind that you don't know, like the name of that niche kitchen tool you saw at a friend's house, it can be surprisingly hard to sift through the volume of information online and know how to search for it. Or, the opposite problem can occur -- we can look up anything on the Internet, but how can we be sure we are finding everything about the topic without spending hours in front of the computer? Computer scientists have created the first fully automated computer program that teaches everything there is to know about any visual concept.

With the right rehabilitation, paralyzed rats learn to grip again

Posted: 12 Jun 2014 11:23 AM PDT

After a large stroke, motor skills barely improve, even with rehabilitation. An experiment conducted on rats demonstrates that a course of therapy combining the stimulation of nerve fiber growth with drugs and motor training can be successful. The key, however, is the correct sequence: Paralyzed animals only make an almost complete recovery if the training is delayed until after the growth promoting drugs have been administered.

Scientists discover link between climate change and ocean currents over 6 million years

Posted: 12 Jun 2014 11:23 AM PDT

Scientists have discovered a relationship between climate change and ocean currents over the past six million years after analyzing an area of the Atlantic near the Strait of Gibraltar, according to new research.

Unexpected origin for important parts of the nervous system

Posted: 12 Jun 2014 11:23 AM PDT

A new study shows that a part of the nervous system, the parasympathetic nervous system, is formed in a way that is different from what researchers previously believed. In this study a new phenomenon is investigated within the field of developmental biology, and the findings may lead to new medical treatments for congenital disorders of the nervous system.

New evidence for 'oceans' of water deep in Earth: Water bound in mantle rock alters view of Earth's composition

Posted: 12 Jun 2014 11:23 AM PDT

Researchers report evidence for potentially oceans worth of water deep beneath the United States. Though not in the familiar liquid form -- the ingredients for water are bound up in rock deep in the Earth's mantle -- the discovery may represent the planet's largest water reservoir. The researchers have found deep pockets of magma located about 400 miles beneath North America, a likely signature of the presence of water at these depths.

Father's age influences rate of evolution: 90% of new mutations from father, chimpanzee study shows

Posted: 12 Jun 2014 11:23 AM PDT

The offspring of chimpanzees inherit 90 percent of new mutations from their father, and just 10 percent from their mother, a finding which demonstrates how mutation differs between humans and our closest living relatives, and emphasizes the importance of father's age on evolution.

Quantum computation: Fragile yet error-free

Posted: 12 Jun 2014 11:22 AM PDT

Physicists have experimentally encoded one quantum bit (qubit) in entangled states distributed over several particles and for the first time carried out simple computations on it. The 7-qubit quantum register could be used as the main building block for a quantum computer that corrects any type of error.

Long-range tunneling of quantum particles

Posted: 12 Jun 2014 11:22 AM PDT

One of the most remarkable consequences of the rules in quantum mechanics is the capability of a quantum particle to penetrate through a potential barrier even though its energy would not allow for the corresponding classical trajectory. This is known as the quantum tunnel effect and manifests itself in a multitude of well-known phenomena. For example, it explains nuclear radioactive decay, fusion reactions in the interior of stars, and electron transport through quantum dots. Tunneling also is at the heart of many technical applications, for instance it allows for imaging of surfaces on the atomic length scale in scanning tunneling microscopes.

Brain power: New insight into how brain regulates its blood flow

Posted: 12 Jun 2014 10:23 AM PDT

Engineering professors have identified a new component of the biological mechanism that controls blood flow in the brain, demonstrating that the vascular endothelium plays a critical role in the regulation of blood flow in response to stimulation in the living brain. Understanding how and why the brain regulates its blood flow could provide important clues to understanding early brain development, disease, and aging.

Manipulating and detecting ultrahigh frequency sound waves: 1,000 times higher resolution ultrasound images possible

Posted: 11 Jun 2014 02:10 PM PDT

Researchers have demonstrated a technique for detecting and controlling ultrahigh frequency sound waves at the nanometer scale. This represents an advance towards next generation ultrasonic imaging with potentially 1,000 times higher resolution than today's medical ultrasounds.

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