Aging of species

The ancient Egyptians actually have a very rich, abundant literary library available to read

Ancient Egypt was one of the most advanced civilization in human history.

Yes, it, and ancient China, were probably ly the premier civilizations of the age of 5,000 - 4,000 BCE. They both, independently, in that era, invented paper and ink technology, one of the markers of advanced civilization.

China has maintained its status but Egypt has lost its glamour.

No, China, as well, was a much greater empire than it is today. But then again, no empire of man endures forever. They all have fallen historically, and all will fall, ultimately. Nothing of mortal man will endure, But more glorious things are in store for us. As Yoda once said, "Beings of light, are we."

These two civilizations seen as the world’s earliest ones, developed numerous similar inventions, institutions and traditions.