Posted: Apr 19, 2019 12:04 am
by Macdoc
virtually killed off all plant and animal life within a few days (or weeks at the most).
The idea that it took some time, (some say a 'million years' or so), for the dinosaurs of that era to die out is apparently not correct.

Pretty certain that is not correct. Will do some chasing. Given what did survive ..I'd say it's unlikely it was that rapid ouside the local blast radius.