From Tools and Bones, Fossils and Rocks
The tools and the hearths and the fossils are plentiful, and some years ago this proof of man’s antiquity seemed to be enough. The great and spectacular mammals whose remains were associated with early man in the Americas, as well as in Europe, were thought to have vanished with the glaciers of the Great Ice Age. Therefore, early man in the Americas must also have lived in that period. Now, however, a number of scientists believe that the American mastodon, along with a number of other animals that are now extinct in the New World, survived the Great Ice Age here. This would still leave us with an American whose antiquity is quite respectable.
The best proof of the age of early man was for a long time geological. Archaeologists dated man by the earth and rocks in which they found his tools or his bones. Unfortunately, they had not too much geological evidence in the Americas. In the past ten years, however, radiocarbon (of which you will learn more later) has made it possible to know much about when man reached the New World and where he lived.
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THE ROAD OF EARLY MAN
I have been a stranger in a strange land. —EXODUS 2:22