It is now admitted that the presence of man in the Old World dates from an epoch so far distant as to be calculated only by reference to geological periods of which we know the succession but not the duration, and research has proved that the same holds good of the Western Hemisphere. Although man undoubtedly found his way from the Old World to the {6} New, the period at which he did so is so remote that for all practical purposes he may be said to have peopled both hemispheres simultaneously. Indeed, "his relative antiquity in each has no bearing on the history of his advancement." It is known that the American continent offers no example of the highly organized primates--for example, the larger apes--in which the Old World abounds, save man himself, and this circumstance is sufficient to prove that the human species must have reached America as strangers. Had man been native to the New World there would have been found side by side with him either existing or fossil representatives of the greater apes and other anthropoid animals which illustrate his pedigree in the Old World. The Great Miocene Bridge Again, many careful observers have noticed the striking resemblance between the natives of America and Northern Asia. At Bering Strait the Old World and the New are separated by a narrow sea-passage only, and an elevation of the sea-bed of less than two hundred feet would provide a 'land-bridge' at least thirty miles in breadth between the two continents. It is a geological fact that Bering Strait has been formed since the Tertiary period, and that such a 'land-bridge' once existed, to which American geologists have given the name of 'the Miocene bridge.' By this 'bridge,' it is believed, man crossed from Asia to America, and its subsequent disappearance confined him to the Western Hemisphere. American Man in Glacial Times