Dinosaurs were constructed with a different type of lung. They initially evolved with a low oxygen atmosphere, and then the atmosphere became highly enriched with both oxygen and CO2 and became extremely huge as a result, as did all plant life. All species did, even exoskeleton land species. Fires were nearly spontaneous because of this condition. These creatures were even prevalent at the poles, so the conditions were that of extreme global warming. Asteroid impact ended that condition extremely quickly, and the existence of those creatures with it, and an ice age ensued. Evolution (as you know it) does not explain everything. There are many other things that are contrary to the prospected theory and proposed timeline of events giving researchers fits, but they are avoided by mainstream proponents for obvious reasons.<quoted text>
Explain your drival better.
That's the jist of it.