“The civilization of Indus River Valley is considered one of the three earliest civilizations in world history”
Correction: One of the earliest studied ancient civilizations.
There is a pyramid in Indonesia with it’s oldest layer said to be 27,000 years old. And it is not the only site in the world with structural remains older than what classic ancient history says are the oldest civilizations.
That 27,000 figure is bogus, the “pyramid” ruins are likely less than 2000 years old.