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

The “game had changed”

The conditions on earth were very different; this made previously good traits (size) not as good

Also note that after the extinction event; not all life died.  Life on earth didn’t reset back to zero.  The animals that survived proved their evolutionary benefits and were able to continue procreating