Interesting. I think that there are some possiblilities that would lay waste to the entire earth. We could see another Ice Age whick killed all the dinosaurs, or a big enough comet could smash into the Earth. The truth is, we need a very specific environment to survive. Some think that the greenhouse effect will do us all in if we don't change our ways, but I really wish I knew more about it. Need to take another astronomy class, or get some more reading done.
It's pretty freaking amazing we exist in the first place, in my opinon. |