After the dinosaurs went extinct, why did they not return over time through evolution?

Question

I never learned much about evolution, so please do explain it like I’m 5

In: Biology

Answer 1

There were some attempts to return to large bipedal raptors, but they were not the most successful. 

Terror birds went exiting due to competition with mammals. Fundamentally, mammals are better at living on the ground game. 

If you transported some dinosaurs into the modern earth, they would get killed by moder predators.  Just look at what cats do to birds in Australia.  Or why there are no penguins in the arctic.