25,000 years ago: Last Glacial Maximum. (Sea level: -120m)
17,000 years ago: End of the reign of Horus, according to Manetho.
15,000-10,000 years ago: Bulk of melting occurs in three “meltwater pulses” (MWP-1a, MWP-1b, MWP-1c). (Sea levels rise 80m, from -100m to -20m, an average rate of approximately 16mm per year.)
14,500-11,500 years ago: Earliest archaeological evidence of civilization in the Nile valley.
14,000 years ago: Beginning of the reign of first pharaohs, according to Herodotus.
12,900 years ago: Hypothetical date of a Younger Dryas impact event.
5,000 years ago: Reign of Pharaoh Manes of the First Dynasty.
4,500±200 years ago: Construction of the Sphinx.