Yes, but their last common ancestor was not much like either. Lots about the sequence of changes seems to be established now: http://www.eartharchives.org/arti

Yes, but their last common ancestor was not much like either. Lots about the sequence of changes seems to be established now: http://www.eartharchives.org/articles/the-evolution-of-whales/ http://www.eartharchives.org/articles/the-evolution-of-whale...