I was personally amused by the GP’s joke about the absurdity of there being any bright lines between different hominid species. And I was also amused by your q

I was personally amused by the GP’s joke about the absurdity of there being any bright lines between different hominid species. And I was also amused by your quip about the laziness of the dark matter explanation for gravity we don’t understand. IMHO there is a place for humor here as long as it’s on topic. Just my 2c.