Цены на нефть взлетели до максимума за полгода17:55
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。同城约会是该领域的重要参考
// 'view' should now be detached and unusable
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Perhaps it’s the biggest question science has left to answer, how did life begin? Now, molecular biologists in Cambridge university have discovered tiny molecules of RNA which they say might provide some clues. Science journalist and author Philip Ball explains what we know and whether we’ll ever find the origins of life on earth.