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Day length helps plants determine when to bloom and is sensed by proteins tuned to blue-light wavelengths in the leaves of Arabidopisis thaliana. These proteins, in turn, help switch on genes that trigger flowering in springtime, a new study reveals. A. thaliana tissues where proteins that measure day length reside are shown stained in blue. 
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Most of the world's advanced economies are highly indebted and scrambling to create economic growth just to balance their books. But the imperative of growth doesn't necessarily advance the world's long-term interests, says Kenneth Rogoff, a Harvard economics professor and former chief economist of the IMF. In recent years, broader measurements of national welfare have been advanced, such as life expectancy, literacy and happiness. Such metrics are not always heavily influenced by GDP growth.
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In the view of esteemed inventor Ray Kurzweil, the pace of technological change in our world is now accelerating so rapidly that there will soon be no distinction between human and machine or between physical and virtual reality - and eventually our technology will match and then vastly exceed the refinement and suppleness of what we regard as the best of human traits
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