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从太空看,地球是一个小小的蔚蓝色的星球,它那么美丽,又那么孤独。在茫茫字宙中,地球上的人类难道就真的没有宇宙中的朋友,太空中真的没有其他生命吗? “生命”到底是什么近年来人类对生命科学的研究飞速发展,对外星生命的寻找也不断取得进步,可惜的是,一直到现在,还没有一个科学界普遍接受的生命定义。生命的本质到底是什么?不同学科有不同的说法。从生理学角度说:生命是具有进食、代谢、排泄、呼吸、运动、生长、生殖和反应性等功能的系统;从生物化学角度定
From the perspective of space, the earth is a small, azure planet. It is so beautiful and so lonely. In the Word of God, do humans on Earth really have no friends in the universe, and there is really no other life in space? What is “life” in the end? In recent years, human research on the life sciences has developed rapidly. Seeking has also made continuous progress. Unfortunately, up to now, there is no definition of life that is universally accepted by the scientific community. What is the essence of life? Different disciplines have different opinions. Physiologically speaking, life is a system that has functions such as eating, metabolism, excretion, respiration, movement, growth, reproduction, and reactivity; it is determined from the perspective of biochemistry.