The Invisible Equator: The Deadly Expedition That Measured the Shape of Earth
Update: 2025-11-22
Description
What does it take to find a line no one can see? This episode uncovers the epic story behind the Invisible Equator—from Eratosthenes’ ancient geometry to an 18th-century scientific mission that braved hostile mountains, political tension, deadly storms, and human tragedy.
Follow La Condamine and his team as they haul tons of instruments into the Andes, lose companions to violence and disease, betray one another, and ultimately prove Newton’s theory of Earth’s true shape.
A tale of genius, obsession, sacrifice, and the extraordinary price paid to map our world.
Please click here to read the text version.
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