Michio Kaku wrote about how it is the challenge for each civilization to guard against such life-threatening catastrophes: https://mkaku.org/home/articles/the-p

Michio Kaku wrote about how it is the challenge for each civilization to guard against such life-threatening catastrophes: https://mkaku.org/home/articles/the-physics-of-extraterrestrial-civilizations/ https://mkaku.org/home/articles/the-physics-of-extraterrestr...