没了子宫的兰丽决定代孕。她向南方周末记者回忆，起初丈夫反对，但她坚持，“我和他说‘就当是对我的补偿’”。
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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