some similar thoughts here on Michiu Kaku's blog: we must establish 'ecological planetary balance' and develop fast enough as a civilization to be able to deal

some similar thoughts here on Michiu Kaku's blog: we must establish 'ecological planetary balance' and develop fast enough as a civilization to be able to deal with recurring catastrophes, like asteroids hitting the Earth: http://mkaku.org/home/articles/the-physics-of-extraterrestrial-civilizations/ http://mkaku.org/home/articles/the-physics-of-extraterrestri...