Germination of the Bristlecone pine tree "Methuselah" about 2700 BC, the oldest tree still living now
2697 BC -- According to Chinese tradition, in this year Huangdi (the Yellow Emperor) united the tribes of Central China. Traditionally regarded as the starting point of Chinese Civilisation
The first famous pharaoh of the Old Kingdom was Djoser (2630–2611 BC) of the Third Dynasty, who ordered the construction of the first pyramid (the Step Pyramid) in Memphis' new necropolis, Saqqara.
The later kings of the Fourth Dynasty were Menkaura (2494–2472 BC), who built the smallest pyramid in Giza, and Shepseskaf (2472–2467 BC).
The final blow was a sudden and short-lived cooling in the region that resulted in a drastic drop in precipitation between 2200 and 2100 BC, which in turn prevented the normal flooding of the Nile.
This all changed around 2630BC with the erection of the step pyramid.
It was made for the pharaoh, Djoser and began as a normal mastaba, but was subsequently enlarged by adding one mastaba on top of another until it consisted of six terraces some 200ft (60 meters) high.
The surface was originally encased in smooth white limestone which must have caught the sun light and reflected its rays.