> oldest fish fossil - 520 my > oldest lungfish fossil - 420 my so 100 my difference. > it does not prove evolution, or specifically what is required: that a fish with gills can mutate into a reptile with lungs. fish changes to an amphibian. there are both amphibians and fish with both gills and lungs > the proof required is a fish that is fully gill-breathing that is in the process of changing into a lung-breathing fish. axolotl is a gill breathing animal that can transform into a salamander and lose gills.
Croatia