Seventy million years ago, the dinosaurs suddenly disappeared, for reasons still a matter of debate, and the little mammals that had been scurrying around at their feet seized their evolutionary chance.
Three and a half million years ago, the Australopithecines began to walk erect.
Archaic forms of homo sapiens appeared a mere three hundred thousand years ago, and the modern form became established within the last forty thousand years. The universe had become aware of itself.