Exploration & discovery

Pytheas of Massalia sails to Britain and the far north

c. 326 BCE

Around 325 BC the Greek navigator and geographer Pytheas left the Greek colony of Massalia (Marseille), sailed through the Strait of Gibraltar and along the Atlantic coast to Britain, which he circumnavigated and measured. He then went north to a land he called Thule, six days' sail from Britain, where the summer sun never set and the sea froze: perhaps Iceland or Norway. He reported the tides and their relation to the Moon and calculated the latitude of Massalia with a sundial. His book On the Ocean is lost, known only through hostile quotations by Strabo and Polybius, who thought it fiction. Later writers confirmed much of what he said.

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This moment belongs to the Ancient civilizations (3,200 BCE to 500 CE), writing, cities and empires. You can also browse everything in the 4th century BCE.