ScienceDaily: Top Science News

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• Sensitivity of carbon cycle to tropical temperature variations has doubled
• Engineers teach old chemical new tricks to make cleaner fuels, fertilizers
• Blue eyes and dark skin, that's how the European hunter-gatherer looked: 7,000-year-old genome shows
• Picture of how our climate is affected by greenhouse gases is a 'cloudy' one

Sensitivity of carbon cycle to tropical temperature variations has doubled Posted: 26 Jan 2014 10:46 AM PST The tropical carbon cycle has become twice as sensitive to temperature variations over the past 50 years, new research has revealed. The research shows that a one degree rise in tropical temperature leads to around two billion extra tons of carbon being released per year into the atmosphere from tropical ecosystems, compared with the same tropical warming in the 1960s and 1970s.

Engineers teach old chemical new tricks to make cleaner fuels, fertilizers Posted: 26 Jan 2014 10:46 AM PST University researchers from two continents have engineered an efficient and environmentally friendly catalyst for the production of molecular hydrogen, a compound used extensively in modern industry to manufacture fertilizer and refine crude oil into gasoline.

Blue eyes and dark skin, that's how the European hunter-gatherer looked: 7,000-year-old genome shows Posted: 26 Jan 2014 10:46 AM PST La Braña 1, the name used to baptize a 7,000-year-old individual from the Mesolithic Period whose remains were recovered at La Braña-Arintero site in Valdelugueros (León, Spain), had blue eyes and dark skin.

Picture of how our climate is affected by greenhouse gases is a 'cloudy' one Posted: 26 Jan 2014 10:46 AM PST The warming effect of human-induced greenhouse gases is a given, but to what extent can we predict its future influence? That is an issue on which science is making progress, but the answers are still far from exact, say researchers.

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