Could 4 separate instances of abiogenesis branching exist on the same planet/enviroment?
I'm writing a little novel with something related and this idea brought be to a stop, I'm not talking about the chance of this occurring 4 times.
But would some virus just evolve in a instance and just kill off everyone else, would a beings immune system be able to fight something 100% foreign? Since now we share \*some\* DNA/RNA even with viruses. #animals