Maybe it is better not to donate to the March of Dimes, because with the right Birth Defects we could grow wings, and simply fly where we wanted to go, if the weather was nice, and the traffic was bad.
Why do you think making fun of unfortunate people constitutes a good joke?
Yikes! That would be bad for those of us who work at the only commercial-airplane company in the U.S. By the way, I have never seen any model of airplane - ever after "16 billion years" - mysteriously show up on the flight line. Maybe it will take another 16 billion years???
"So are "Birth Defects" the driving force of evolution, or not? "
Huh? Uh, no. I had blond hair when I was young. My brother had red hair. My sister had black hair. That's genetic variation. Genetic variation drives evolution, along with the need to survive and reproduce in the existing environment.
You really should read an elementary level book on the theory of Evolution. I will help you not to appear ignorant in your messages. Ask the librarian at your local public library to recommend one for you.