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.
BBC訪問了住在阿聯酋（UAE）的人，以及在當地度假的遊客，他們描述了和平日完全不同的生活景象。，推荐阅读新收录的资料获取更多信息
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相比处理器大升级的 MacBook Pro，今年的 MacBook Air 就显得更加乏善可陈了一些——