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.
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圖像加註文字，美國大法官布雷特·卡瓦諾與艾米·科尼·巴雷特（右）對特朗普是否有權徵收關稅持不同看法，巴雷特反對任命她的總統的主張。特朗普是否為美國爭取到18兆美元投資？