How did the Ancient Greek Philosophers know that the Earth is Spherical?

Have you ever wondered how we know that the Earth is round? In this video, we explore the insights of the ancient Greek philosophers who deduced that the Earth was a sphere long before modern technology. From Pythagoras to Hipparchus, we examine the observations, logical reasoning, and mathematical calculations that led these philosophers to believe in a spherical Earth. Join us on this fascinating journey through history and discover how the ancient Greeks laid the groundwork for modern science and astronomy.

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[A_J]

Patience and a willingness to ask questions and change your mind is critical for learning.

[bj.bruner]

They measured it.
The ancients were a lot smarter than we give them credit for

[ScooterDoge]

Never wondered. They saw eclipses. It’s pretty obvious.