Ruff

Captain James Cook's three epic journeys between 1768 and 1779 were the last great voyages of discovery.

Sailing some 170,000 miles, Cook's ships reached every continent and every ocean, from the Arctic to the Antarctic, from Kamchatka to Java to Easter Island to the coast of Oregon.

Before Cook set off, one third of the world's map remained, simply, blank.

By the time he was done, there was little left to discover.