We know a lot about Egyptian history from the times that Egyptians wrote on stone, because those stone writings have lasted for centuries—from Egyptian days until now. We know a lot about Sumerian history too, because clay tablets last for a long time if they’ve been baked hard. But we don’t know a great deal about what happened in Egypt after the Egyptians started writing on paper, because in the thousands of years that have gone by, the paper writings of the Egyptians have crumbled and disappeared.
