A selection of science related links of intrest that I’ve come across recently:

The Moon’s structure and composition are not as well understood as one might think : The Moon’s Mantle Muddle: Maybe we’ve been looking for the wrong minerals, or maybe our models are wrong – Daily Planet/Air & Space Magazine

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How many people do you need in your exoplanet colonization caravan to insure a healthy diversity of genes? How Many People Does It Take to Colonize Another Star System? – Popular Mechanics

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A nuclear detection sensor system detects more asteroids hitting the earth than thought: Blast Sensors Detect More Asteroid Strikes Than Expected – NBC News.com

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Theoretical physicist Sir Roger Penrose is skeptical that the recent measurements of variations in the cosmic radiation background necessarily validate the Inflation Model as the explanation of the early universe: Sir Roger Penrose: Cosmic Inflation Is ‘Fantasy’ – Science Friday