ScienceDaily: Top Science News |
- Study dispels theories of Y chromosome's demise: Stripped-down chromosome retains key genes for fertility
- Battery development may extend range of electric cars
- Capturing a hard-wired variability: What makes some identical twins noticeably different?
- Loss of large carnivores poses global conservation problem
- Iconic Australasian trees found as fossils in South America
- Astronomers discover new planet in Pisces constellation
- Surprising new class of 'hypervelocity stars' discovered escaping the galaxy
- Ultra-thin flexible transparent electronics can wrap around a hair
- Scientists make living brain cells from Alzheimer's patients biobanked brain tissue
| Posted: 09 Jan 2014 02:57 PM PST Population geneticists compared the Y chromosomes of eight African and eight European men to understand why the chromosome is so puny. They attribute the size to strong natural selection to remove harmful genes -- so-called purifying selection -- but find essential roles for the remaining genes, dispelling the common notion that the Y's genes are mostly unimportant and that the chromosome is destined to dwindle and disappear.  |
| Battery development may extend range of electric cars Posted: 09 Jan 2014 02:55 PM PST Electric cars could travel farther on a single charge and more renewable energy could be saved for a rainy day if lithium-sulfur batteries can last longer. Scientists have now developed a novel anode that could quadruple the lifespan of these promising batteries.  |
| Capturing a hard-wired variability: What makes some identical twins noticeably different? Posted: 09 Jan 2014 11:37 AM PST A new study has uncovered a phenomenon that alters prevailing views of how the genome is expressed to make and sustain the life of mammals. The article helps explain why genetically identical animals are sometimes so different in their biology and appearance, and why some inherited disorders caused by a shared set of aberrant genes can be of such variable severity in different people.  |
| Loss of large carnivores poses global conservation problem Posted: 09 Jan 2014 11:37 AM PST In ecosystems around the world, the decline of large predators such as lions, dingoes, wolves, otters, and bears is changing the face of landscapes from the tropics to the Arctic -- but an analysis of 31 carnivore species shows for the first time how threats such as habitat loss, persecution by humans and loss of prey combine to create global hotspots of carnivore decline.  |
| Iconic Australasian trees found as fossils in South America Posted: 09 Jan 2014 10:26 AM PST Today in Australia they call it Kauri, in Asia they call it Dammar, and in South America it does not exist at all unless planted there. But 52 million years ago the giant coniferous evergreen tree known to botanists as Agathis thrived in the Patagonian region of Argentina, according to an international team of paleobotanists, who have found numerous fossilized remains there.  |
| Astronomers discover new planet in Pisces constellation Posted: 09 Jan 2014 10:25 AM PST Astronomers have discovered a new giant planet located in a star system within the Pisces constellation. The planet, perhaps twice the mass of Jupiter, could help researchers learn more about how extrasolar planets are formed.  |
| Surprising new class of 'hypervelocity stars' discovered escaping the galaxy Posted: 09 Jan 2014 09:49 AM PST Astronomers have discovered a surprising new class of "hypervelocity stars" – solitary stars moving fast enough to escape the gravitational grasp of the Milky Way galaxy.  |
| Ultra-thin flexible transparent electronics can wrap around a hair Posted: 09 Jan 2014 07:36 AM PST Researchers are developing electronic components that are thinner and more flexible than before. They can even be wrapped around a single hair without damaging the electronics. This opens up new possibilities for ultra-thin, transparent sensors that are literally easy on the eye.  |
| Scientists make living brain cells from Alzheimer's patients biobanked brain tissue Posted: 07 Jan 2014 07:26 AM PST Scientists, for the first time, generated induced pluripotent stem cells lines from non-cryoprotected brain tissue of patients with Alzheimer's disease.  |
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