It has happened many times. The crab has been evolved into several times throughout history. Rats and mice are not even closely related. Of course, it's not the same exact species each time but similar enough to be considered almost the same to most people.
Flendarp t1_j5ll5ax wrote
Reply to why do we not see the reappearance of extinct lifeforms anymore if evolution can retrace its step to redevelop it? by 0011000l
It has happened many times. The crab has been evolved into several times throughout history. Rats and mice are not even closely related. Of course, it's not the same exact species each time but similar enough to be considered almost the same to most people.