> some hybrids are partially sterile or non viable in some direction. This could explain the extinction of neandhertals and rescue of sapiens IMAO How could so

> some hybrids are partially sterile or non viable in some direction. This could explain the extinction of neandhertals and rescue of sapiens IMAO How could some interbreeding problems between two species explain the extinction of an entire species? What do you mean by "rescue"? > Neanderthals were probably much more solitary than sapiens That's not at all what the evidence shows.