On Tue, 21 Mar 2000 Dinogeorge@aol.com wrote: > It probably >did< kill frogs and turtles and mammals and birds. It just > didn't kill >all< of them. Circularity: frog survival is a challenge to asteroid-kills-all non-avian dinosaurs hypothesis. But, because it did kill all dinosaurs, it must have had an effect on frogs--"it just didn't kill >all< of them."