hi faul,
the fact that not all biological questions are solved doesn't mean that certain astro-geological events did not happen. not sure why you think that there's a connection.
but i do know you are always sceptical of scientific consensus. which means nothing is ever going to persuade you. but anyway ...
re the cretaceous extinction event.
they have the geological record and the iridium layer which makes the impact likely to have an extraterrestrial origin.
they have the chicxulub crater to match it during the extinction period.
there's a broad consensus that the asteroid impact ended the dinosaur era.
so i guess readers will have to choose between the folks who study geology and meteor impacts and tell us what they think happened to a fairly high degree of probability and your belief that no such event occurred.
it isn't the scientific method if there isn't room for doubt. but it has to be a stronger theory to overthrow the old one. especially as the old one seems consistent with the known evidence.
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