Defuq do you get your facts from? We have found dinosaurs. Do you think they just kinda DIED IN SOME RANDOM EXPLOSION CAUSED WHEN ONE T REX TRIED TO BONE A MIDGET FLAVORED BIRD and then humans was alls like "oh hey, I exist too!"? No they evolved to suit they're needs in the food chain. Their prey got smaller to run away faster so they got smaller to run away faster. Simple logic. And btw long term adaptation=evolution.