answer:If humans existed during that time, they would have figured out a way to survive. Granted, I highly doubt it would resemble anything in the existence we now know, but they would have figured out the migratory patterns of dinosaurs, or moved to places where dinosaurs didn’t enjoy much, which as I understand it tended to be colder climates. I can’t imagine it would be an existence with many people, certainly not the billions we now have, but it would still exist. And likely, they would have developed a way to combat the dinosaurs. So maybe we would have skyscrapers afterall.