Darwin himself realized that any kind of significant saltational change would imply a miracle-like intelligent intervention.
Chances are, we’ve all attended a lecture, a conference, or some other event that was said to be “critical,” “momentous,” or even “life-changing.”
In a word, they are unresponsive.
As in all other disciplines within the life sciences, embryonic development is not complying with evolutionary theory.
The laws of the universe are necessary for life to exist. But they aren’t sufficient to explain how life arose.