At the intro of the movie when an asteroid is heading towards the planet, the narrator says it's when the dinosaurs roamed the earth (65 million years ago). However, if you watch closely at where the meteor lands, it lands somewhere near the Gulf of Mexico.
It is widely accepted that 65 million years ago, these continents would not be like they are today, perhaps more of one big clump of land. The earth portrayed in this intro however is the earth as it is today. Ooops.. where was NASA on this one?