But flys ...ummm flies...(my spell checker yelled at me).. change to more interesting flies...not butterflies.

The fish in some fossil records do show fin structures similar to those walking fish of today. This experiment merely shows how survival OF fish which accidentally developed such structures might have been aided. It's just one of many indicators.

(And by the way, a couple of years ago, another outcropping of very ancient fossils was found near the Burgess Shale in Canada. Remember... these fossils, which originally lived under water were found at 8000 ft altitude. It takes awhile to get up there.)

Dozens of scientific discoveries in various disciplines ALL point to extreme age and various dating methods support the basic calculations. Science has to go where the hard evidence takes it, even if the evidence & map has to be re-evaluated due to new data. NONE of the data indicates any 8000-10,000 year age.