(根据维基百科)[1],“所有已知类型的生物能够一定程度的对刺激的回应,繁殖,生长和发育和通过体内平衡自律。”Further, watching a video like the "[Earth Breathes as Seasons Change][2]" - superficially give the sense that "Earth is alive" so to speak.

地球的历史表明,它能够显示“增长和发展。”Climate change, I would think shows Earth "responds to stimuli," and that it is able to "self-regulation" conditions to remain stable and relatively constant. Might even be possible to prove that given all life has a common source, and that source may have common from another planet, that "planets" are able to reproduce.

说,似乎很困难,如果不是不可能证明“地球还活着。”

这是为什么,观察是否会导致地球被贴上一个有机体?[1]:http://en.wikipedia.org/wiki/Organism[2]:http://www.youtube.com/watch?v=kSNbLYHRrU8