Quote:
Originally Posted by KC911
Extremely high I would venture....give it time. It's only been 64 million years since the last big one...but it's certainly not the last one. Humans....we don't matter....as inconsequential as T-rex fwiw. I sleep well at night however 
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some speculation the most recent big one
maybe wiped out the american mega-cridders
about 12,900 years ago at the Younger Dryas beginning