ScienceDaily Environment Headlines
for Sunday, December 27, 2009
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Exposure to young triggers new neuron creation in females exhibiting maternal behavior (December 27, 2009) -- Maternal behavior itself can trigger the development of new neurons in the maternal brain independent of whether the female was pregnant or has nursed, according to a new study. The study was performed in adult, virgin rats. ... > full story
Flowering powers genetic understanding (December 27, 2009) -- New research on how plants adapt their flowering to climate is also helping to unravel some of the mysteries of how genes are controlled. Studies on a gene in Arabidopsis that controls flowering time are providing potential roles for non-coding RNA. ... > full story
Iranian Scholars Share Avicenna's Medieval Medical Wisdom (December 27, 2009) -- For pulmonary ailments, certain medieval physicians had a useful medical textbook on hand offering detailed information remarkably similar to those a modern doctor might use today. ... > full story
Further progress toward AIDS vaccine: Rabies-virus vaccine protects monkeys (December 26, 2009) -- Researchers are one step closer to developing a vaccine against the AIDS disease. They have found that a rabies virus-based vaccine administered to monkeys protected against the simian equivalent of the HIV virus (SIV). ... > full story
How the daisy got its spot: Insect mimicry (December 26, 2009) -- Dark spots on flower petals are common across many angiosperm plant families and occur on flowers such as some lilies, orchids, and daisies. Much research has been done on the physiological and behavioral mechanisms for how these spots attract pollinators. But have you ever wondered what these spots are composed of, how they develop, or how they only appear on some but not all of the ray florets? ... > full story
Tourists in Antarctica cause of major concern (December 26, 2009) -- The 40,000 'eco-tourists' who visit the South Pole every year cause enormous greenhouse gas emissions. The visitors to the snow-covered landmass are endangering not just the Antarctic region by their actions, but also the rest of the world. Scientists have investigated the impacts of increased tourism on Antarctica and how this impact could be curbed. ... > full story
Certain genes boost chances for distributing variety of traits, drive evolution (December 26, 2009) -- Genes that don't themselves directly affect the inherited characteristics of an organism but leave them increasingly open to variation may be a significant driving force of evolution, say scientists. ... > full story
The past matters to plants (December 26, 2009) -- It's commonly known that plants interact with each other on an everyday basis: they shade each other out or take up nutrients from the soil before neighboring plants can get them. Now, researchers have learned that plants also respond to the past. ... > full story
Low-cost temperature sensors: Tennis balls to monitor mountain snowpack (December 26, 2009) -- Dime-sized temperature sensors, first built for the refrigerated food industry, have been adapted to sense mountain microclimates. ... > full story
Sun and moon trigger deep tremors on San Andreas Fault (December 25, 2009) -- When the sun and moon are aligned with the San Andreas Fault they tug on it enough to increase the tremor rate deep underground, according to a new study. While these tremors have not yet been linked to earthquakes, the tremors are associated with increased stress on the fault and may increase the risk of future quakes. The ease with which the deep rock slips indicates it is lubricated by high-pressure water. ... > full story
Microscopic flower petal ridges flash to attract pollinating insects; scientists now know how ridges form (December 25, 2009) -- Microscopic ridges contouring the surface of flower petals might play a role in flashing that come-hither look pollinating insects can't resist. Scientists now have figured out how those form. The result could help researchers learn to enhance plants' pollination success and even could lead to high-grip nanomaterials and "green chemical" feedstocks. ... > full story
Ski runs are not created equal (December 25, 2009) -- Building a new ski run by bulldozing a mountainside, rather than only cutting its shrubs and trees, is far more damaging ecologically, yet might offer only a week's earlier start to the downhill season, says a new study. ... > full story
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