Empirical Earth · How We Know — History & the Cosmos

What ancient societies actually believed about Earth’s shape

The claim

“A flat Earth is humanity’s natural, original belief; the sphere is a recent idea.”

What is measured

The round Earth is not a modern imposition. It was argued from evidence ~330 BC and measured ~240 BC. The notion that everyone “always knew it was flat” is itself a 19th-century invention.

What would show this is wrong

an authentic pre-modern scholarly tradition that measured or demonstrated a flat Earth and maintained it against the spherical evidence, or contemporary documents showing medieval universities taught a flat Earth.

Sources

  1. Eratosthenes measures the Earth. By ~500 BC most Greeks held the Earth to be round; Pythagoras proposed a sphere on principle, and by ~330 BC Aristotle (On the Heavens) gave physical evidenc link
  2. The myth of the medieval flat Earth. Educated medieval Europeans understood the Earth to be a sphere — taught by Bede and Isidore of Seville, in university curricula via Sacrobosco’s De spha link
  3. From flat-disc cosmology to the Greek sphere. Early Egyptian, Mesopotamian and Homeric cosmologies pictured a flat disc of land surrounded by a world-ocean beneath a domed sky; the spherical link
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