Civilization is a lot older than what most of us are taught in school. We have epic writings and literature that is over 5 thousand years old. We have structures and calendars that have documented 2 great years! This can be verified due to the alignment of structures and constellations in relation to planets and our own Earth's axis changing.
Most of the information we have is made up, reinvented garbage, the oldest chain of time literature is the Vedas. The Vedas even describe Atomic Bombs as Oppenheimer himself reflected upon detonation of his modern atomic bomb.