“If this is accurate, we should find intermediate forms of species in the fossil record providing evidence of phyletic gradualism. Let’s take the example of whales, which evolved about fifty million years ago from a four-legged, land-dwelling vertebrate called Pakicetus.1 Figure 9.1 lists some descendants of Pakicetus, including Ambulocetus, Remingtoncetus, Protocetus, and Dorudon, which ultimately evolved into current-day whales and dolphins.”