How do we know Earth is round?

Members of the Flat Earth Society claim to believe the Earth is flat despite scientists explaining how we know the Earth is ...

Why flat-Earth theory keeps doing the rounds

In the first part of this series, she weighs up the idea that the Earth could really be flat… In 1838, Samuel Rowbotham, an ...
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Why humanity has known the Earth is round for millennia

Thomas Mulligan traces the ancient origins of astronomical knowledge to reveal how our ancestors deciphered the true shape of ...