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Did you know . . . • People first used skis more than 8,000 years ago? • The first wheels were used in pottery—not for transportation? • Traffic jams of

The dramatic development of European oak chronologies over the last ten years parallels and supplements the bristlecone-pine chronology in the United States. De

Samuel Krüger is a railway engineer with over thirty years' experience in the railway industry worldwide. He started as a commissioning engineer in Portugal an