We've actually sped up, but just slightly, after having slowed slightly over eons. I agree with you, though. I think it would take something massive hitting us to create this kind of destruction--an extinction level event. Or something massive passing closely enough to affect us and change our orbit or destroy our moon. Perhaps even some massive ejection hitting us from the sun. But I don't lose sleep over any of those ideas because I think they aren't likely to happen in my lifetime. We're more likely to die from cancer, heart disease, pneumonia or the common flu than anything else. (Or the stupidity from our own government.) Either way, I'd encourage people to enjoy life as much as they can, love the people around you, do your research and follow your intuition on how to prepare. I don't waste my life living in fear. It's too short as it is. But I have prepared for more common man-made disasters as best I can. And that did mean moving my family to a more rural area with plenty of clean air, clean water, hunting and fishing, and people with a more conservative mindset than the cities. Which has been the right thing to do for us.