My understanding is that the known fossil record is extremely clear on this, and is additionally quite consistent to the extent where I'm unaware of any competing hypotheses that are taken seriously.
As far as science goes, it seems to be as established as it gets. Again, unless you've got convincing evidence to the contrary. Really not sure what your agenda is here?
As far as science goes, it seems to be as established as it gets. Again, unless you've got convincing evidence to the contrary. Really not sure what your agenda is here?