ScienceDaily Top Science Headlines
for Saturday, September 17, 2011
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How single stars lost their companions (September 16, 2011) -- Not all stars are loners. In our home galaxy, the Milky Way, about half of all stars have a companion and travel through space in a binary system. But explaining why some stars are in double or even triple systems while others are single has been something of a mystery. Now a team of astronomers think they have the answer -- different stellar birth environments decide whether a star holds on to its companion. ... > full story
Switch that controls stem cell pluripotency discovered (September 16, 2011) -- Scientists have found a control switch that regulates stem cell "pluripotency," the capacity of stem cells to develop into any type of cell in the human body. The discovery reveals that pluripotency is regulated by a single event in a process called alternative splicing. ... > full story
It’s all in the head: Songbirds with bigger brains have benefited from the end of communism (September 16, 2011) -- The abundance of songbirds with relatively large brains in Eastern Germany and the Czech Republic has increased since 1989/1990. The increase in large-brained songbirds is attributed to the better cognitive abilities of the species enabling them better adaption to the socio-economic changes affecting habitats after the end of communism. ... > full story
Yellow patches around eyelids predict risk of heart problems, study finds (September 16, 2011) -- Raised yellow patches of skin (xanthelasmata) around the upper or lower eyelids are markers of an individual's increased risk of having a heart attack or suffering from heart disease, a new study finds. ... > full story
Biochemical cell signals quantified: Data capacity much lower than expected, scientists find (September 16, 2011) -- Just as cell phones and computers transmit data through electronic networks, the cells of your body send and receive chemical messages through molecular pathways. The term "cell signaling" was coined more than 30 years ago to describe this process. For the first time, scientists have quantified the data capacity of a biochemical signaling pathway and found a surprise -- it's lower than a dial-up modem. ... > full story
Number of children poisoned by medication rising dramatically, study says (September 16, 2011) -- The number of young children admitted to hospitals or seen in emergency departments because they unintentionally took a potentially toxic dose of medication has risen dramatically in recent years, according to a new study. The rise in exposure to prescription products has been so striking that the U.S. Centers for Disease Control and Prevention has established the PROTECT Initiative, intended to prevent unintended medication overdoses in children. ... > full story
Shake, rattle and … power up? New device generates energy from small vibrations (September 16, 2011) -- Today's wireless-sensor networks can do everything from supervising factory machinery to tracking environmental pollution to measuring the movement of buildings and bridges. Working together, distributed sensors can monitor activity along an oil pipeline or throughout a forest, keeping track of multiple variables at a time. While uses for wireless sensors are seemingly endless, there is one limiting factor to the technology -- power. A new tiny energy harvester picks up a wider range of vibrations than current designs, and is able to generate 100 times the power of devices of similar size. ... > full story
New class of stem cell-like cells discovered offers possibility for spinal cord repair (September 16, 2011) -- Scientists have announced the discovery of a new class of cells in the spinal cord that act like neural stem cells, offering a fresh avenue in the search for therapies to treat spinal cord injury and disease. ... > full story
Resistance to antibiotics is ancient (September 16, 2011) -- New research findings show antibiotic resistance is a natural phenomenon that predates the modern clinical antibiotic use. The breakthrough will have important impact on the understanding of antibiotic resistance. ... > full story
Prenatal exposure to stress linked to accelerated cell aging (September 16, 2011) -- Young adults whose mothers experienced psychological trauma during their pregnancies show signs of accelerated aging, a new study has found. The researchers discovered that this prenatal exposure to stress affected the development of chromosome regions that control cell aging processes. ... > full story
Smartphone battery life could dramatically improve with new invention (September 16, 2011) -- A new "subconscious mode" for smartphones and other WiFi-enabled mobile devices could extend battery life by as much as 54 percent for users on the busiest networks. ... > full story
Cities to grab lands equaling size of Mongolia In next 20 years, study predicts (September 16, 2011) -- In the next 20 years, more than 590,000 square miles of land globally -- more than twice the size of Texas -- will be gobbled up by cities, a trend that shows no signs of stopping and one that could pose threats on several levels, a new study suggests. ... > full story
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