Comment by SideburnsOfDoom

> Imagine if life had evolved on Earth or Theia prior to impact.

There's good reason why this first era of Earth's history is called the "Hadean eon" - as in the fires of hell.

> Throughout part of the eon, impacts from extraterrestrial bodies released enormous amounts of heat that likely prevented much of the rock from solidifying at the surface. As such, the name of the interval is a reference to Hades, a Greek translation of the Hebrew word for hell.

https://en.wikipedia.org/wiki/Hadean

https://www.britannica.com/science/Hadean-Eon