thanks for the bump,most of the former dinos lived in the once lowlands where the air would have been thicker to support their giant size...man also existed along side them as the fossilized creek bed in Texas with human and Dino tracks together proves ..a blinded Dino from archers cannot fight ,even a meat eater...they were hunted at night after the hunters used belladonna to dilate their eyes...the remaining dinos after the global tip were hunted into extinction just as the do do and other extinct animals were...belladonna was a hunters best friend besides the group and weapons...blind it ,trip it,rope the claws,then cut the main blood vein and it bleeds out,then meat for a week or more from just one dino..2 sets of hunters would hunt together ,the wide eyed ones,and the ones who would lit fires to drive the dinos and half blind them with the fire towards the area of the wide eyes waiting on the already half blinded animal by the fires...covered in camouflage the wide eyes would not be seen...good theory ,dont you think?