Are birds scared of heights?

Do you think that any bird has been scared of heights? If so, would it evolve into something flightless, like New Zealand’s Kakapo?

If that’s the case, did we evolve from an aquaphobic fish? Sounds mad, BUT, it could happen!

Evolution is a strange thing, and I don't pretend to understand it, but is it the creation of solutions to problems that exist, or is it creating problems by solutions that don't?

What prompted the evolution of an eyeball? What decided that being able to see (and therefore interpret) gives an advantage over blind genetic peers? Is it only based upon how efficiently the thing could grow and reproduce... What decided reproduction was a good idea? Is it because death is built in?