Gentlemen;

I am just a mining engineer/geologist, semi-retired, but interested in all things natural, including the fate of the dinosaurs in the distant past and the fate of the human race in the not-too-distant future.

Isn't there a problem with the meteor-impact-related theories of dinosaur exit in that the geologic record shows that they did NOT disappear overnight, but over a period of thousands of years, or more ?

Cannot argue that there was not a major change in local climates at the time of the KT-Boundary - but isn't it likely that something non-spectacular, like a particularly potent strain of influenza or pneumonia, could then bring on the demise of vulnerable species worldwide ?

Thanks for your contributions!