This book presents a plausible account of how thousands of tons of unusually pure copper ore from Isle Royale in northern Michigan's Lake Superior was mined and shipped to Europe by the Minoans 4500 years ago during the Bronze Age, and how Stonehenge in England was used as an aid to Minoan celestial navigation back and forth across the Atlantic Ocean. The author proposes that Minoan ocean navigators used stone circles, particularly Stonehenge, to advance the science of celestial astronomy of Bronze Age navigation and trade.