(Smithsonian Institution) These initially relatives of whales had several properties of land mammals—hind legs, nostrils for breathing near the front in their nose, and enamel of varied measurements (rather than baleen or tooth of a single dimension, like modern-day whales have). Around 40 million yrs back, early whales like Maiacetus https://charlesk284lmn1.life3dblog.com/profile