I remember a phrase that stuck to my memory from one of Asimov's (or was it A.C. Clarke?) ... "most black holes are industrial accidents"Also proof that very different organisms can evolve is to look at the octopus.
https://www.scientificamerican.com/article/an-octopus-could-be-the-next-model-organism/
Any life form may have existed and gone extinct millions of years ago and we will never know.





