So many factors have to be met in order for life to not only evolve from simple, single-celled life forms into multicellular organisms but to even continue existing.
>star has to be of a certain size and type
>planet has to be of a certain size and type
>planet has to be a certain distance from its star
>planet has to be geologically active with a magnetic iron core to deflect radiation from its star
>planet needs a satellite of a certain size and distance to help regulate the planet’s axis
After all of these conditions are met, the planet still needs to have a large amount of surface water and even then scientists still have no clue how life started on Earth. There may be a need for some sort of 1 in a trillion chance panspermia event. How did Drake come up with his equation?