Yes, we need evidence. Your word doesn't mean jack shit. My common sense tells me that this information is discernible from the fossil record. Many actual scientists in various paleontological fields produce and verify these data. I am quite certain they know this topic better than you.
And since you seem to be unable to produce any evidence and, instead, start yammering about "common sense", I think the question is settled - you just lack the balls to admit it.
And since you seem to be unable to produce any evidence and, instead, start yammering about "common sense", I think the question is settled - you just lack the balls to admit it.