Thousands of years ago, during the last ice age, there were periods when so much water was packed into huge glaciers in North America and Europe that the level of the sea fell perhaps as much as 400 feet below its present level. As the sea fell, it receded and the shape of the continents changed. Since the sea between Alaska and Siberia is shallow, the result was to unite the American and Asian continents. It happened gradually, of course, but the land bridge, as it is called, extended over 900 miles, north to south and was in existence for hundreds of years.
This book is the story of how knowledge of Beringia has grown and developed over the past century. Its focus is David Hopkins, a geologist with such a wide ranging curiosity that he could not rest with a single line of interpretation, but must consult scientists in other fields, specialists in the study of pollen, teeth, insects, linguistics, etc. It is a well written and highly interesting book.
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