How were Egyptian hieroglyphs deciphered?
Egyptian hieroglyphs were deciphered in 1822 by French scholar Jean-François Champollion, using the Rosetta Stone, which had the same text in three scripts.
Reference: Encyclopaedia Britannica
Egyptian hieroglyphs were deciphered in 1822 by French scholar Jean-François Champollion, using the Rosetta Stone, which had the same text in three scripts.
Hero of Alexandria described the aeolipile, a spinning steam-powered device, in the first century AD, but it was treated as a curiosity rather than a machine for work.
Construction of Germany's Cologne Cathedral started in 1248 and was not finished until 1880, more than 600 years later.