Remember that when you have mass movements of people you have a reason find it and you have the solution for the collapse.
Decided to look up timelines of major meteor strikes. Here are a few links.
http://worldtimeline.info/impact/ [a lot of older information, stops about year 1000]
https://www.newscientist.com/article/dn9974-timeline-comet-and-asteroid-impacts/ [not so much earl information, but interesting odds of future hits]
http://whyfiles.org/106asteroid/2.html [this is a more narrative look at the meteor hit phenomenon]
http://www.scientificpsychic.com/etc/timeline/asteroid-impact.html [Discussed here are more recent hits, and Firestone’s work in N America]
Decided to look up timelines of major meteor strikes. Here are a few links.
http://worldtimeline.info/impact/ [a lot of older information, stops about year 1000]
https://www.newscientist.com/article/dn9974-timeline-comet-and-asteroid-impacts/ [not so much earl information, but interesting odds of future hits]
http://whyfiles.org/106asteroid/2.html [this is a more narrative look at the meteor hit phenomenon]
http://www.scientificpsychic.com/etc/timeline/asteroid-impact.html [Discussed here are more recent hits, and Firestone’s work in N America]
http://www.timelines.ws/subjects/Comets.HTML [this site has a lot of more recent information]
http://geology.com/meteor-impact-craters.shtml [threw in the word Craters and found this interactive map with 50 craters]