Wanderer One: the Four-Dimensional Earth

Millions of years ago, the earth was a four-dimensional space. Dinosaurs are a lie used by prehistoric civilization to cover up the truth. A cosmic war tore apart the four-dimensional light cone, and the earth fell into three dimensions. A part of the four-dimensional civilization remained in this universe - they lost their home and wandered deep in the Orion Arm for hundreds of millions of years. They were called the "Wanderer Civilization". Another part of the four-dimensional civilization is involved in another parallel light cone and continues to exist in the separated dimension, never completely reducing its dimensionality. They completely retain their four-dimensional form and technology. When Zhang Yu used his life to tear open a wormhole near the sun, the two light cones were connected again, and the complete four-dimensional earth civilization passed through the wormhole and arrived in the name of "return". The Wanderer civilization stands at the junction of two universes. They and the returnees are two branches of the same civilization - one stayed in place and was downgraded by the dimension; the other escaped into parallel time and space and was completely preserved. They did not choose to side with humanity. There was no choice to side with the returners. They just keep wandering. All that is left to mankind is a star map.