(March 12, 2015 at 12:41 pm)Huggy74 Wrote:(March 12, 2015 at 12:36 pm)robvalue Wrote: Everything (likely) has a common ancestor, but that doesn't mean that every animal family family is descended from every other, or vice versa. Your aunt can't give birth to your brothers, to use a metaphor.
That's not the point, the point is, where has one animal family been observed to split off into a separate animal family? (however you wish to define it)
Hm. A Family is two steps down from species. The farther you go down the taxonomic ladder the 'more stable the label'. I can't think of a change in family, like Carnivora becoming Feliforma and Canidae that wouldn't take millions of years.
I'm not anti-Christian. I'm anti-stupid.