23日，中国载人航天工程办公室一则公开征集航天育种实验搭载项目的消息引发关注。到底什么是航天育种？目前已经有多少种子开展过太空之旅？如何才能成为一颗合格的“太空种子”？有哪些作物种子上过太空？航天育种就是“太空种菜”吗？我们为什么要锲而不舍地开展航天育种实验？带着这些问题，一起一问到底。
什么是航天育种？为何要进行航天育种？
什么是航天育种？我们又为什么要持之以恒地进行航天育种呢？
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