Dinosaurs never evolved as humans have, their is no record of a dinosaur in prehistoric history thinking abstractly. There is also new evidence coming to light that is sparking a debate that dinosaurs did not become extinct by an impacting asteroid, there is evidence that points to a theory that dinosaurs were already on the threshold of extinction by natural order of selection. The impacting asteroid just helped it along. You must understand that many scientists support the theory of Carl Sagan that the average life span of a species is about an average of two million years, around then, it is theorized that genetics begin to fail, and animals start to become extinct. Humans and other earthlings are a fluke in the universal community, many scientists are baffled that we are even here and have even made it to the degree of intelligence we now have. Theoretically speaking we shouldn't even be here but we are. Many of us are ignorant of just how hostile the universe is. How we evolved is still a great mystery, and somthing archeologists, geneticists, and scientists have been trying to piece together for decades. The fact is, is that man desended down from a great great great ancestor who resided in or around southern Ethiopia, this great grand father was the scientific Adam, every human male on Earth carry's his Y chromosone, the diverse cultures such as European, Asian and others are the result of mutations of this chromosone. We also share this same chromosone with Orangutangs, Gorilla's and Chimpanzee's, we share it with no other creatures, which leads us to the theory of evolution where man is desendant from apes. Mind you that this evolution takes thousands of millenia, and during that time fossil remains are scattered about everywhere and many missing links have yet to be uncovered. Yet we do have a good idea of what the finished puzzle is going to look like, and it's only a matter of time before it comes into full view and we can get a first hand glimps of the big picture. Mind you, that we all are decendents from these tribes, and the caucasian Adam as portrayed by many religions is an image of sheer fantasy. It is based on science that scientific Adam had an eastern African appearance and would look and appear as something similar to the pictures below. Say hello to your great, great, great, great, great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great, great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great, great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great, great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great,great, great, great, great, grand father.

Dinosaurs would have followed the same method of evolution as every other creature on the planet. Now reptiles are ectotherms (use external means to regulate their body temperature) so they need a lot of sunlight to survive just like today's lizards. The larger the reptile the more sunlight is needed. When the asteroid hit Mexico and the giant volcanic eruptions in India created a dust cloud over practically the entire planet. This dust cloud cut out so much of the sun that nothing on this planet with a body mass of over 50 Lbs survived this extinction event accumulation, that left about 5% of the life on this planet. All of the large reptiles, dinosaurs, are now extinct and those left followed other evolutionary paths towards the crocodiles, turtles and lepidosaurs (snakes, lizards etc.). Us mammals and birds (our sibling from the reptiles) that were below the 50 Lbs limit survived because we are endotherms, we regulate our own body temperature from within. So we didn't need the sun, in fact the mammals at the time were nocturnal anyway. Mammals also developed more sensory equipment and better equipment than reptiles, this called for a more developed brain. Mammals are the most clever animals, no question. Thus us humans have many advantages over reptiles, including those that evolved directly from the dinosaurs.