Then tell us how and why the dinosarus evolved feathers. Better yet, why don't you go back and tell us how and how and why the first living self replicating cell "evolved." Since that only involves one cell that would obviously be easier to explain the "how and why" than explaining "how and why" a 5 ton feathered dinosaur evolved from a..... what did the dinosaurs evolve from, anyway?
given:
1. large population of identical single-cell organisms, all dependent upon the same environment for nourishment and habitat.
2. ambient radiation
3. time
result:
1. large population of non-identical single cell organisms, with a wide range of genetic mutations (some lethal, some maladaptive, some trivial, some advantageous in one way, some advantageous in another way, some simultaneously advantageous AND disadvantageous, etc...), all competing in the same environment for nourishment and habitat.
2. a changed competitive paradigm
that was a ridiculously easy exercise of basic theory.