Starting from rebirth, revealing the secrets and rising

As the most outstanding scientist in his previous life, he actually had another identity that no one knew about. He was actually a Reincarnator and had experienced two lifetimes as a human. Would he be able to continue his glory in his third life?

They came to see why dinosaurs died, to see the terrifying Bell of Death, to see the dark drill ten thousand meters underground…

In the end, when the alien civilization descended, would humanity unite to resist it or would it perish?