What if the asteroid that supposedly hit the Earth did not manage to wipe out all the dinosaurs?
What if a particular dinosaur species managed to survive and continued to evolve into another life form?
This may seem to be an outrageous hypothesis but my speculation resulted after reading Dale Russell’s theory.

After studying the discovery of a new partial skeleton, the Canadian palaentologist wondered how the Stenonychosaurus, a dinosaur species that once existed in what is now western Canada, would look like if it happened to evolve.
Russell credited the Stenonychosaurus as being the most intelligent dinosaur as a result of its large brain.
Like Humans, It stood upright and its height varied between five and six feet. Compared with other dinosaurs, it walked on its long, thin, hind legs and had long thin arms with long thin flexible fingers.
The brain was probably concerned mainly with its highly developed senses, fine control of the limbs, and fast reflexes, which were used for hunting small prey.
The lightly built Stenonychosaurus was an active hunter. Its long grasping hands and large eyes pointing forward enabled it to have stereoscopic vision, meaning it was a nimble predator which was active day or night.
What it might have lacked in speed, it would have made up for by its superior intellect. This would have allowed it to avoid potential predators by outwitting them rather than by running away.
As a predator the Stenonychosaurus was able to catch its prey both by endurance running and perhaps by making simple weapons similar to those the primitive homo sapiens would do millions of years later!

Can we suppose the Stenonychosaurus had a 65 million year head start on the homo sapiens? What if Darwin’s theory is wrong and we descended from the dinosaurs instead of apes?
Lets not forget that Humans and dinosaurs have two very important similarities, according to researchers the brain of both species is completely controlled by the R- complex allowing them to express anger, greed, hatred, aggression and the will to wipe out their own kind for no reason whatsoever.
It's a thought, isn't it?

Sources:
http://www.subversiveelement.com/Aliens_Dinosauroids.html
http://www.enchantedlearning.com/subjects/dinosaurs/glossary/indexs7.shtml
http://en.wikipedia.org/wiki/Dale_Russell
http://en.wikipedia.org/wiki/Dinosauroid#Evolutionary_thought_experiment
http://en.wikipedia.org/wiki/Reptilian_complex
http://www.buffalostate.edu/orgs/bcp/brainbasics/triune.html