Evolutionary publications are full of similar exercises in imagination. Such scenarios must be presented for the simple reason that the fossil record stubbornly fails to cooperate in producing tangible evidence for evolutionary suppositions. Because whales, dolphins, and porpoises are mammals, evolutionists are forced to speculate that they evolved from even-toed land mammals such as cattle, pigs, or buffalo many millions of years ago. As eons passed, changes slowly occurred. Hind legs disappeared, front legs changed into flippers, hair gave way to a thick smooth blanket of blubber, nostrils moved to the top of the head, the tail broadened into flukes, and in the buoyant water world, the body became enormous.
Conjecture means guesswork or even fantasy.
Things haven't changed much since the publication of this book. That they did not apply their energies to creating vaccines or structural members for high-rise buildings is a lucky stroke for society. Imagination in these cases is never an acceptable substitute for empirical results. But today, human evolution is still in the grips of imagination. People eventually arising from flatworms is an example of such a Herculean stretch of the imagination, but it totally lacks in scientific verification.