Deciphering Rosetta Stone. July 15, 1799.

The Rosetta Stone is a granodiorite stele, rediscovered in the western world in 1799, inscribed with three versions of a decree issued at Memphis, Egypt, in 196 BC during the Ptolemaic dynasty on behalf of King Ptolemy V. The top and middle texts are in Ancient Egyptian using hieroglyphic script and demotic scripts, respectively, while the bottom is in Ancient Greek. As the decree has only minor differences between the three versions, the Rosetta Stone proved to be the key to deciphering Egyptian hieroglyphs, thereby opening a window into ancient Egyptian history. The stone, carved during the Hellenistic period, is believed to have originally been displayed within a temple, possibly at nearby Sais. It was probably moved in Late Antiquity or during the Mameluk period, and was eventually use...

The Eclipse of Thales. May 28, 585 BC.

The Eclipse of Thales was a solar eclipse that, according to The Histories of Herodotus, was accurately predicted by the Greek philosopher Thales of Miletus. If Herodotus’s account is accurate, this eclipse is the earliest recorded as being known in advance of its occurrence. Many historians believe that the predicted eclipse was the solar eclipse of 28 May 585 BC. How exactly Thales predicted the eclipse remains uncertain; some scholars assert the eclipse was never predicted at all. Others have argued for different dates, but only the eclipse of 28 May 585 BC matches the conditions of visibility necessary to explain the historical event. According to Herodotus, the appearance of the eclipse was interpreted as an omen, and interrupted a battle in a long-standing war between the Medes...

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