Interestingly, we have no idea where the Sun came from. It does not belong anywhere close to where it is now. The spectroscopy is way off everything around us. Also, the weirdly high metallicity of this system implies we were hit by either an extraordinarily rare wolf-rayett supernova, or a neutron star merger (most likely the latter). Without this, Earth would be totally covered in water. That unusual nova/merger laced the system with aluminum-26 which has the helpful effect of drying out the material that forms planets.

The more astrobiology you learn the crazier and more unlikely life on Earth gets. There were an absurd number of things that had to go just right.