Guesses are for when you have no physical evidence at all, like when you guess that God personally reached down and stretched their little bones right into the proper shape by hand. ;)
Those stupid dinosaurs took eons to do the same thing. Hmm, well maybe the pterosaurs also took the shortcut.
There's lots of way to go from Dallas to Detroit, and I know of no mandate that everyone must travel the same route.
No, but the methods of transportation were designed.(P.S. drunks fall into ditches, they don't make it from Dallas to Detroit.)