| Asteroid Dust Could Shield Earth from Harmful Solar Radiation Posted: 03 Oct 2012 08:57 AM PDT  Scottish scientists have proposed to use a giant space-based dust cloud, blasted off an asteroid, to shade the Earth from the sun. Deliberately manipulating the Earth’s climate with large-scale engineering projects is called geoengineering and these proposals are always controversial because of the risk that they entail. The scientists will publish their findings in the [...] 
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| Scientists Measure the Photocurrent of a Single Photosynthetic Protein Posted: 03 Oct 2012 08:21 AM PDT  In a recently published study, scientists show that the photocurrent generated by a single photosynthetic protein, photosystem I, can be measured using a scanning near-field optical microscope set-up. An team of scientists, led by Joachim Reichert, Johannes Barth, and Alexander Holleitner (Technische Universitaet Muenchen, Clusters of Excellence MAP and NIM), and Itai Carmeli (Tel Aviv [...] 
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| Breast Milk Molecule Can Raise the Risk of HIV Transmission Posted: 03 Oct 2012 07:57 AM PDT  Scientists have discovered that a sugar that occurs naturally in breast milk can double the likelihood of a HIV-negative baby acquiring the virus from an HIV-positive mother. The molecule is called 3′-sialyllactose (3′-SL) and it is found in varying concentrations in the milk of women. The scientists published their findings in the American Journal of [...] 
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| Titan Experiences Seasonal Changes Posted: 03 Oct 2012 07:35 AM PDT  Astronomers have been researching Saturn's moon Titan for roughly 30 years, discovering that the moon experiences seasonal changes that affect it more than previously thought. The researchers presented their findings during the European Planetary Science Congress of 2012 in Madrid last Friday. Athena Coustenis, from the Paris-Meudon Observatory in France, analyzed the data. Just like [...] 
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| New Genetic Modifications Result in Cows with Allergen-Free Milk Posted: 02 Oct 2012 10:17 AM PDT  New genetic modification techniques have allowed geneticists to engineer cows that secrete allergen-free milk and pigs that can serve as models for atherosclerosis. The cows lack an allergy-inducing protein, which was blocked accurately using RNA interference. In the pigs, scientists used the TALEN enzyme to scramble a gene that would normally help remove cholesterol. Researchers [...] 
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| Carbon Absorption by Plants Limited by the Abundance of Soil Nutrients Posted: 02 Oct 2012 09:51 AM PDT  As carbon dioxide levels continue to climb in the Earth’s atmosphere, most current climate models project that the world’s oceans and trees will keep soaking up more than half of the extra CO2. However, researchers have spotted a problem with the capacity of plants to absorb more CO2. It’s now expected that this capacity will [...] 
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